Is it a Pozidrive or a Philips Bit?

Hi,

I have to pull up the left door to close it. There is a slack of about 1/4 to 3/8 inch at the latch because the lower hinge is worn. I can feel a play in it.

Can I get away with it just by adjusting the door? In any way, I will have to unscrew those big screws. This bit on the picture fit very well on the screws. Is this a Pozidrive bit? If not, what is the difference betwen Pozidrive and Philips?

I have a hand held impact and also a good Chicago pneumatic Impact whrech. Wich one is the best one to use on those screws.

Thanks!

Alain

A pozi-drive bit will typically have a flat spot in the center like yours, where a phillips will go to a point. The screws are easily identified by a "crosshair" in between the "phillips" type slots.

That is a Phillips bit. As the Phillips bit has four protrusions creating the "x" profile, a Posidrive bit will have four additional smaller "protrusions" set in the concave section of the Phillips profile. Look closely at a posidrive screw and you will see cuts in them to receive these additional protrusions. Hope that makes sense.

Cheers,
Stu

The small bit in the photo is a #4 phillips. The 3/8" drive bit is a #4 Pisidrive.
Not a lot of difference but when you try both in a MGB door hinge screw the posidrive fits tight and the #4 Phillips is a loose fit.

Clifton

Use a #4 Pozi-drive if the screws are original. They can be found but are tough to find. I found a 12 " breaker bar with a #4 Pozi mounted on a 3/8 drive head (like in the picture above) worked great for all these screws. Do not use a phillips head unless you plan to replace the screws you loosen with new. Ask me how I know............ I used a phillips (screwed it up) ;) on one then did it right>>>>>>>>>>>

Absolutely use a #4 Posi. Hammer type impact works best on these..............

Once you use a Pozi you will never have to ask. The difference is unbelievable. Most people don't know that Philips screws were *designed* to prevent too much torque from being applied. They were created to stop ham-fisted assembly line workers from over tightening things. Pozis are meant to grip!

B-racer Wrote:

I'm going to have extras in about a week. See my post above.