What are these screwdriver bits called?

[SkyHawk]

I saw these in a cheap Winchester gunsmith kit and want to get some in a few sizes. What would I be looking for?

They are standard(ish) bits with very short tips, I think in smaller sizes they would be useful to bust loose some well-stuck screws.

I watched a friend twist and break off a few bits recently trying to loosen some rusty screws on his duck hunting shotgun and when I saw these I thought of him

The four I have drawn arrows towards are the ones I am specifically asking about.

[G-forceJunkie]

Just a flathead, but a nice machined one to fit a screw slot exactly. Companys make them in a varity of diameters and blade width. Always use the tightest fitting one you can. Chapman is a well known brand: https://chapmanmfg.com/collections/individual-parts

[SkyHawk]

Just a flathead, but a nice machined one to fit a screw slot exactly. Companys make them in a varity of diameters and blade width. Always use the tightest fitting one you can. Chapman is a well known brand: https://chapmanmfg.com/collections/individual-parts

Thank you. Those look nice and maybe even a tad better than Wheeler, but I don't see anything like the four bits I pointed out in my pic.

Also, I don't see a lot of variety there - Wheeler has way more slotted bit sizes to choose from and I already have every single one of them, but none like the four in that Winchester kit.

It also looks like at least two of the four I noted in the Winchester kit have concave tips

[Jeepergeo]

Magna-Tip brand is the way to go. Brownells carries nice sets and come with the Brownell warranty. Buy once, cry once.

[pacrat]

SH said;

It also looks like at least two of the four I noted in the Winchester kit have concave tips

I believe the perceived concave appearance is a visual illusion. Utilizing further machining step, just to make a weaker more likely to snap tool. Just does not make sense.

I would strongly suggest caveat emptor for the shown set. Or any other likely [hecho in china] hand tools.

Hard to beat good ole American Steel.

[IronsightsRifleman]

Maybe anti tamper bits of some kind for heads like this.

[SonofWWIIDI]

Does the tip of a flathead really need a taper starting an inch (or more) from the tip?



That?s all I got.

[divingin]

The hollow-ground tips the OP shows are to lessen the risk of the tip levering itself out of the slot and mangling the screw in the process. I don't know if it helps or not, but it does seem to be pretty standard in gunsmithing and other high-end repair work. AFAIK, they are not specifically intended for the one-way security screws.

The Chapman bits are this style hollow-ground flat head, and are fairly inexpensive if bought individually ($3 - $5 a piece as I recall.) I'm sure others make them as well.

[BrassCase]

Does the tip of a flathead really need a taper starting an inch (or more) from the tip?



That?s all I got.

If you don't like that profile then buy a screwdriver with a "cabinet tip" which has shank without flair. These usually work better for electricians.

[bergmen]

Just a flathead...

It is a flat blade, not a flat head. That is the term for a particular type of screw that requires counter sinking.

Dan

[foxtrotuniformlima]

I saw these in a cheap Winchester gunsmith kit and want to get some in a few sizes. What would I be looking for?

They are standard(ish) bits with very short tips, I think in smaller sizes they would be useful to bust loose some well-stuck screws.

I watched a friend twist and break off a few bits recently trying to loosen some rusty screws on his duck hunting shotgun and when I saw these I thought of him

The four I have drawn arrows towards are the ones I am specifically asking about.

Hollow Ground is what they are called. Chapman makes some nice ones. I think the real benefit is the wide availabity in sizes - you can get the best fit.

[ivanimal]

Flat ground

I buy the Wheeler brand

[ar15barrels]

Does the tip of a flathead really need a taper starting an inch (or more) from the tip?



That?s all I got.

The tips are like that because they are forged from the material that the screwdriver shaft is made from.

[kcstott]

Does the tip of a flathead really need a taper starting an inch (or more) from the tip?



That?s all I got.

if the tapper is not long enough how are you supposed to use it for a pry bar??