32 votes

What screwdriver I should use for this screw head?

It appears that the hex sides of that screw head have been rounded off due to the use of an ill-fitting hex wrench. A metric and an SAE hex wrench will both fit in there, but the use of the wrong one, ...
  • 32.3k
30 votes
Accepted

What is the right tool for old, rusty, flat cross head bolts?

Looking at the condition of the nut and the minimal profile of the head, I'm afraid the better question may be "how do I get these out with minimal damage to the wood?" I'd take a drill to ...
  • 21.1k
28 votes

Need more torque for driving screws

drilled a 6 mm hole in the masonry, then used brown wall plugs and #8 screws Your hole was too small and the screw was the wrong size or type. A #8 screw has a 4mm diameter. Brown wall plugs fit ...
27 votes

What screwdriver I should use for this screw head?

I mostly agree with FreeMan, but I think this was originally a Torx (six-pointed star) drive. The corners look deeper than I'd expect from an Allen drive. I would get a set of Torx bits and look for ...
  • 109k
21 votes
Accepted

Safe to screw on a paper towel holder way above socket?

If you are concerned about the presence of wiring near where you are installing this, grab yourself a stud finder with "live wire" detection from your local hardware store. Entry level ...
19 votes

What ikea screwdriver type is this?

It is called a "hex key", "Allen key", or "Allen wrench". You can also find socket wrench tools with this hexagonal drive shape. Hex key socket wrenches are almost always stronger than Allen keys, ...
18 votes
Accepted

Why does my drill bit destroy the screw head?

It is possible that there are several reasons for the screw head destruction. You may be using an electrical tool that is not at all suitable for driving screws. Some tools designed for drilling ...
  • 62k
18 votes

What is the right tool for old, rusty, flat cross head bolts?

I would use a small grinder ( Dremel) with a cut-off wheel and cut the nuts off.
  • 7,801
18 votes
Accepted

What tool should I use to remove this screw in my miter saw motor housing?

Get a heavy duty bolt with a slotted head that fits the rectangular projection. Turn it upside down and put the slot on the stuck bolt. Then you should be able to get a grip on it it. You may need ...
16 votes
Accepted

Identify this screw head (was: Security Torx)

This is a tamper proof torx screw. There are torx bits with a hole in the center that will remove them, if you are bold you can try smacking the center pin with a punch at an angle (small ones usually ...
  • 100k
14 votes
Accepted

How do I unscrew a hex screw that doesn't have any grip anymore?

You may have some luck with a screw extractor. They come in various styles - here are two of them: The extractors are designed to screw themselves down into the head of the screw while at the same ...
  • 62k
14 votes
Accepted

What is the purpose of this inverted Philips head screwdriver bit?

The bit that you are asking about is what is called a "concave Phillips" or "inverted Phillips" bit. They are used for removing screws that look like this: (picture found at ebuy7.com) The cross ...
  • 62k
14 votes
Accepted

What's this bolt head type and how can I open it?

It looks like a spanner tamper-proof security bolt. Either buy a set of tamper-proof security bits, or modify a cheap standard slotted screwdriver with a dremel tool. Here is a cheap set: https://www....
  • 1,919
12 votes

Which Cordless Drill Setting should I use for Self Drilling Screws

With my variably speed drill (with an adjustable clutch), I usually start out fast until the screw starts to penetrate the 2nd piece of metal. Then I slow it down and snug it up gently. Like others ...
  • 4,488
11 votes

Safe to screw on a paper towel holder way above socket?

I wouldn't worry too much. Modern electrical standards have wire stapled an inch and a bit back from the interior of the drywall. If your screws are less than 1.5" long, you shouldn't hit anything. If ...
11 votes

What screwdriver I should use for this screw head?

Find the largest allen or torx wrench or bit that is small enough to fit in the rounded-off hole. Mix up some 5-minute epoxy or epoxy putty, and put a blob of it into the hole. Immediately insert the ...
  • 5,071
11 votes

What is the right tool for old, rusty, flat cross head bolts?

Normal flathead screwdriver in theory I believe these are simply used to make it easier to apply a flathead screwdriver with at most 90 degrees of turn adjustment needed. So in theory you can just ...
  • 1,829
11 votes

Which Cordless Drill Setting should I use for Self Drilling Screws

I am assuming that you're mating two pieces of relatively thin metal, right? If your drill trigger is pressure sensitive then just take it slow until the metal is firmly attached. Don't overspin it ...
  • 12.3k
10 votes

What's this bolt head type and how can I open it?

It is a simple security slot headed screw. A flat headed screw has part of the slot filled in to make it difficult for the average joe to undo. Either purchase a set of security bits or take an old ...
  • 22.3k
9 votes
Accepted

Are impact driver bits a different standard than screwdriver bits?

Those little bits aren't really made to go straight into the chuck. Even if the chuck is made to grip the little grooves, it's hard to see the tip with it so close to the chuck. There might not be ...
8 votes

How is a Phillips screwdriver size determined?

The Phillips screwdriver size is based on the size at the very tip. Based on diagrams of the tip from the original Phillips patent (shown in one of the links to sizes.com), I'm guessing that the ...
8 votes

Why does my drill bit destroy the screw head?

Is this an impact driver? If not, Lower the torque setting on the drill. Use the correct sized bit for the screw. For Phillips head screws there are several sizes. If you are using a Pozidriv screw,...
  • 1,041
8 votes

How do I unscrew a hex screw that doesn't have any grip anymore?

I usually just cut a slot in the screw head with a Dremel or similar rotary cuttter, and then use a regular screwdriver to unscrew.
8 votes

Adapter for 1/4" electric screwdriver to hold 3/8" bit

There are plenty of ways you can adapt a 3/8" bit onto a 1/4" drive. That's actually not your real problem. The real problem is that there is no way a basic screwdriver is going to be able ...
8 votes

What tool should I use to remove this screw in my miter saw motor housing?

It almost looks like a T head bolt, but not exactly. Due to irregular size, I would recommend a universal socket; those are the sockets with all the little pins in them that are pushed out of the way ...
7 votes

How do I unscrew a hex screw that doesn't have any grip anymore?

If the head is readily accessible you can use a fine toothed metal saw to cut a groove with which you then can use a regular flat screwdriver to unscrew.
  • 390
7 votes

Any hand drill device that can accept any kind screw drivers tools

You realize that they make screwdriver bits to go into drills that will also go into the chuck of your hand drill. You can get longer bits that will fit easily into the chuck, for example: You can ...
  • 9,192
7 votes
Accepted

What is the Philips screw naming convention (Mn)? What is 2 in M2?

"M" screws are all metric, by standard. The number following the M is the outer diameter of the screw threads, in millimeters, so an M4 screw's threads have an outer diameter of 4mm. See Wikipedia ...
  • 9,192
7 votes

I need help identifying what type of screw head this is

Abused is the kind of screw that IS. Could have been any of Philips, JIS (looks like Phillips but the angles are different - tend to strip easily if Phillips rather than JIS driver used on them), or ...
  • 145k
6 votes
Accepted

Which tools to use for changing locks?

Congratulations on becoming a home owner. You will soon learn to use lots of tools if you plan to do any DIY projects around the house. Most locksets only require a #2 Phillips screwdriver. You ...

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