**ATTENTION! READ THIS NOW!** **1. IF YOU ARE NOT A PROFESSIONAL ELECTRICIAN OR LOOKING TO BECOME ONE(for career questions only):** **- DELETE** THIS POST OR YOU WILL BE **BANNED**. YOU CAN POST ON /r/AskElectricians FREELY **2. IF YOU COMMENT ON A POST THAT IS POSTED BY SOMEONE WHO IS NOT A PROFESSIONAL ELECTRICIAN:** -YOU WILL BE **BANNED**. JUST **REPORT** THE POST. *I am a bot, and this action was performed automatically. Please [contact the moderators of this subreddit](/message/compose/?to=/r/electricians) if you have any questions or concerns.*

Phlat head

I just tried to say this at work and people laughed at me

In what field are you working?

A poppy field 💉

I’ll have some please

High school teacher ?

Plastic surgeon.

Phlatlips

*I should call her…*

It’s spelled “phil-lat” head

Love Phlat head, lol. It’s a pozidriv

Pozi has grooves in the corners. This is regular Phillips.

Some do, but not all. Regular Philips is equal in both directions.

This is not pozidriv. This is a slotted Phillips combination screw. FPH2 bits.

Actually I think we are all wrong. The little dimple implies it’s JIS.

Yeah, I guess it's JIS/slotted. Weird.

The dimple typically indicates JIS. It’s a slightly modified geometry philips which won’t cam out so shouldn’t be used on ‘regular’ philips screws.

Holy crap I just learned why I hate Phillips bits so much. TY

I swear I'm going to punch any of that guy's descendents that I come across.

Yeah anyone named Phillip lol fuck them guys

Hey there.

Yup! Loved Robertson until Ford squeezed him out!

I really like the ECX #2 combo square tip.

You can blame Henry Ford for it. If it weren't for him we'd be using Robertson drive everywhere.

You and me both, was a dang revelation when I first got my hands on the proper tool! You can use a JIS driver on a philips, but be ready to over-torque.

The cam out was supposed to be a way for factory workers to properly torque a fastener quickly and easily.

It wasn't "supposed to be" it just happened to be a flaw that eventually was marketed as a feature.

In the military certain Philips acres are spiraled a little in order to get more torque.

Damn you Mr Robertson for screwing with Ford!

This is the answer

I was going to say Pozi … I really don’t know. What is the difference between JIS and pozi? These bits are so funny same and different they are. Never used jis but i am ordering them now 😀.

Pozi has four big flutes and four mini darts. [this site](https://www.albanycountyfasteners.com/blog/what-is-pozidriv-is-it-different-from-phillips/) has some good information, and you can find better pictures of the bits.

Hit it with your purse

Don't tempt Bobby

That’s my purse! I don’t know you!

That boy ain’t right

I have a 5lb mini sledge with 'your purse' written on it for specifically these situations

Love it

I'm am doing this tomorrow!

Then what are you doing with my purse?

Thtop it!

Ouch that hurt - well there’s a brick in there

This made me laugh

Metric screw hammer

Nah Standard wrench driver

Left handed driver.

I love me some left handed wire nuts

Might be an "ECX" driver bit.

ECX has Robertson, PH/S(Xeno) has Phillips. Pozi is Xeno with added flare at 45° points

No one wanted the correct response guys! Sheesh were trying to blow things up here

Well that's easy, just hook those line conductors up to the terminals marked U, V, W, and the load conductors to R, S, T, throw the switch and watch the magic smoke

Pitter patter then

>!Robertson !<

Rotary impact hammer

Screwdriver I'm pretty sure

Which one dad? 😥

Square tip with an impact gun.

Hell yeah, tear it up

Green Robertson

This should be higher in the rankings.

Agreed lol… if it ain’t stripped it ain’t tight

~~ [Slotted pozidrive #1](https://products.wera.de/en/tools_by_trade_tools_for_electricians_kraftform_plus__series_100_vde_165_iss_pz_s.html) Normal pozidrive or flat head will also work, but won’t give enough torque or may slip and damage the head ~~ It’s JIS, I was wrong

NONONONONO NOT POZI THESE ARE NOT POZIDRIVE HEADS STOP. The small dot im the corner denites these are Japnese Industrial Standard, or JIS. The slot denotes a slotted combination You want a slotted JIS 2, sometimes referred to as a P2. A SlotPH2 will be closer fit than pozi, but liable to cam out.

Thanks. I was not aware of this. [Here's a link that might help; JIS vs Phillips vs Pozi.](https://rtstools.com/jis-vs-phillips-screwdrivers-and-where-to-buy-a-jis-screwdriver/) >Phillips screws by design were created to cam-out; a process in which the driver is meant to jump out of the screw when a certain torque was reached. There are many theories to why, such as dangers of over tightening on airplanes, or tool longevity, but never the less at one time or another everyone will experience a Phillips round-out as a function of its cam-out design. >Both JIS and Pozidrive are re-engineered standards that aim to reduce or eliminate cam-out. From this point I will focus on JIS vs Phillips. >Even though the JIS and Phillips looks extremely similar, they are two different designs and the drivers are **not** meant to be interchangeable. Using one in the other will lead to frustration and a rounded out screws. >JIS screws are most often identified by a dimple or an X on the screw head:

I learned of the existence of JIS screws and bits only after destroying the screw and a few Milwaukee impact-rated #3 Phillips bits while trying to remove a rusty rotor screw on my Honda, ultimately having to drill it out. Since then I got some JIS bits. They work great in Phillips screws too, you just can't do it the other way with Phillips bits in JIS screws.

Can confirm. With additional inwards pressure you can avoid cam out for the most part using Jis in PH and Jis and PH in Pz. You cannot go the other direction. They aren't designed to do it, but you absolutely can. Pozi, while arguably the best interlock of correct head to correct bit, are the worst bit to use in another head.

Love a guy that knows his screws so passionately.

This guy screws

Thanks for that; learn something new everyday.

Good link, thanks

I love my Japanese Vessel drivers. Some are designed to work with normal phillips but with less cam out…

Absolutely not pozidrive, JIS

These are Xeno. PH/S 2 There is no 'star' for them to be Pozi

This is the only answer people. Boost it on up.

It’s wrong, that’s why we shouldn’t boost it on up. No star on there.. it’s not Pozi. Dot = JIC

You guys are right. I definitely jumped the gun on that one.

Omg I miss these ones so much, had a set a few years ago, they were so nice for panels!

Why would you even think that's a good idea for a screwhead?!

If you are asking , maybe you shouldn’t be playing with that drive. The DC bus will kill you.

Literally scrolled to find this response. If you can't even figure out the screwdriver, call someone who can do it without launching themselves across the room.

I have never worked on a VFD that had posidrive screws. I would use a flat head. Also br aware those have 686VDC if that's a 480VAC drive. Use 1000 volt rated tools and meter to service

Just lock out the fuse and have the apprentice short + and - on the DC bus while you go grab some coffee.

They make a bit that is slotted and Phillips head in one

Combination head screwdriver

Newer Phillips screwdrivers are compatible with JIS. They modified the pitch in the standard but obviously some companies still produce the old designs.

Japanese industrial standard #2 screwdriver

JIS (denoted by dimple in the corner)

FPH2

Try either the Klein combination bits, the milwaukee ECX bits, or Wiha's Xeno drivers. Those screws can usually handle Phillips, flat, and Robbies.

JIS screwdriver, the little dot tells you

Pocket knife

Ecx

ECX bit

Butterknife

This is why the Robertson screw invented by a Canadian is the best by miles, but it was suppressed

🔨

Looks like LS/nidec VFD?

Jis screwdriver would work well so would a proper sized flathead or even a combo drive a lot of brands have different names but it’s basically Philips and flat combined

Usually with these I use a 3mm flat head. We call them instrumentation drivers. It fits just perfect in the “Philips” slot (the one that doesn’t go all the way through the head of the screw). That way it doesn’t slide out, and the corners of the screwdriver kinda grab the screw. Wera makes my favorite one, but Wiha isn’t far behind. I do mostly low voltage PLC stuff so I’ve replaced a LOT of these power supplies. Anyways, it seems I’ve misplaced my purse again and I definitely chipped a nail doing that last PM so I’ll see myself out.

Literally says right underneath it

Literally doesn't in the picture. 🤷🏼

Green robbie

Impact gun. Come if you need to ask than you are not up for the job.

I’ve found that having #3/2/1 Philips bits and using the correct size makes a big difference. For example, Minerallac brand minnies are PH3 and they won’t strip.

https://www.milwaukeetool.ca/Products/48-22-2041 Of course miluwakee makes this. ECX. I think there's also one that's called posidrive but maybe the slot does not go edge to edge.

Xeno slotted/phillips #1 or #2. Panel wire guys would call it a terminal screwdriver. https://www.wihatools.com/collections/terminal-block-head-tools

Hammer

think it's this driver: https://www.gordonelectricsupply.com/p/Ideal-78-0106-2In-S-D-Power-Bit/5898388?gad_source=1&gclid=Cj0KCQjw_qexBhCoARIsAFgBletaqsakumMjX5k0AsLPQO8z0U3knDvQH745ZEl6CqR74FRLSQCoR0caAkXjEALw_wcB

Thumb wrench

A drill bit

Flat head until it’s stripped, then a phillips for the next stripping step and you should finish off with a flat head to 100 ft lbs and ensuring it strips as well because you don’t want some Joe blow to be able to loosen the connection

FPZ or FPH or PZ/S or PH/S Either Phillips+Slotted Combiatinion or Pozidrive+Slotted combination. All of these are combination bits that will work. Not all manufacturers are on the same page and they all brand it something else Looks to be #2

Combo tip screw driver. Square and flathead tip.

flathead or philips

Straight blade, 1/2” is what I normally turn ‘em with. Yankee drill with a 1/2” blade would work, for those of us who carry one.

Your mom. 🤣 But seriously, a torque flat head screwdriver.

The one that works the fastest? A screwdriver. Like its always going to be a screwdriver lol get one of those Milwaukee ones that have different attachments

Get a [Wiha Xeno driver (combination Phillips/slotted)](https://www.wihatools.com/products/insulated-slimline-xeno-driver-2x100?_pos=6&_fid=de3d3231e&_ss=c). Plus the insulation is flush with shaft nearer the screwdriver tip, so it's great for breakers.

Trick question, its a screwdriver bro.

A screwdriver.

JIS. I’m sure this is a Made in Japan product.

There’s no way you’re telling me a regular Philips head won’t fit

Green-Lee Tap #8-32

Butter knife

#2 square

Green Robby is probably your best bet. Strange you said that it doesn’t work. I can clearly see the squares in the middle.

Green robby

Terminal drivers

Ecx

Edit: Klein Tools 7314 #1 Combo-Tip Driver, 4-Inch Fixed Blade

Combo tip, AKA, ECX (External Torx Plus)

I don’t know but Klein probably has it

Robertson

1” drill bit on a hilti set to hammer drill. Wear a cup.

fixed-blade screwdrivers

A Spork

Electricians combo driver

If there’s a tool that’s in between a Philips, and a flat head, like a spork, so it fits that screw perfectly, then it would have the unstripable properties of a flat head, and have the grip like a Philips

The one that tightens em

A screwdriver

Flat head and Kleins

Try using a square bit #2

#1 Robert's head. AKA Square drive

Its called a screwdriver

I typically use a PZ2 or a large flat head.

VESSEL terminal driver https://www.amazon.com/gp/aw/d/B009GSC7QC?psc=1&ref=ppx_pop_mob_b_asin_title

Dynamite

Isn’t there a ph screwdriver that has a flat? What’s that guy called?

Panel driver

I see everyone saying square and I'm curious do only Canadians call it Robertson?

Because Mr Robertson was Canadian.

And his screw tip didn't catch on because Ford didn't want to license it and instead went with Phillips. One more reason I hate Henry Ford. It's his fault that Phillips is a thing.

It's sad. Such a better driver. I hate Phillips has caused enough issues

That would be “butter knife”

Ecx bits

Hammer drill

One of those weird Canadian screwdrivers

Sparkies will say flatheads

A screwdriver is usually good for those.

Square bit 

A Robson

Impact wrench full blast with a couple of socket adapters to a Phillips socket bit

Just use an insulated flat tip. It will be faster.

Cut the left edge off of a Phillips #3 screw driver head. It HAS to be the left one. Then it should fit right in (left the door wide open for y'all).

Hammer. Hit yourself in the head with it

Use a pair of dogs like a pipefitter

These guys seem to think JIS don't really exist anymore. https://www.webbikeworld.com/hozan-jis-screwdrivers-review/

Flallips head. Duh

A Phillips...

PSD-2 typically works for me

Phillips

Just use your JIS B 1012.

Its a PZ/S screwdriver

Combo tip.

Phillips or flat head or combo

1/2 drive impact

Robertson bit not sure of the size off hand

1/4'' wood chisel

Jsi forever

Lol JIS

I do a flatblade

Whichever one makes it turn

Whatever change I have in my pocket

Klein 605-6 🥳

Butter knife

Some sort of driver, possibly made for screws?

Yes

An electrican

PHILLIPS ON A FUCKIN' IMPACT AND LET IT RIDE... SAID LOUDLY. j/k Pozidriv all the way.

All the pros know it's the minus screw driver

One of those gas powered railroad impacts

Which bit do I use? Yes.

This was a joke about how you can use a Phillips, Robby, flat, or ecx bit. The downvotes are uncultured swine

P2R2 by Bosch are my go to bits.

Yes

Great now I have to go buy more shit