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• Colorful Torx bits!

• This set starts with security torx and goes on to include security hex drive (also with a hole in the middle), tri-point (like Philips but with three sides), and spanner bits.

• When ordinary Allen wrenches are not enough, these bits let you use your ratchet wrench handles to drive hex fasteners with great conviction. When I broke one of these on a stuck set screw, so much energy was released that there was a bright spark at the point of fracture. This is a lesson in why spark-proof brass tools exist for use where explosive gas may be present: hardened steel can and will spark when stressed to the point of failure, or just hit hard enough.

• This adjustable depth stop will hold any standard hex mount bit. By rotating the inner part relative to the outer, you can set the position of the sleeve that surrounds the bit. The idea is to provide an automatic depth stop when the sleeve reaches the surface. We will see this as a built-in feature in drywall screw guns a bit later.

• Color coded bits are pretty!

• Screwdriver bits are available not just for screwdriver handles, but also for ratchet wrench handles (the kind normally found in socket wrench sets). This huge slotted driver bit, for example.

• Philips bits tend to wear out, especially when used with power drivers and automatic depth stops, which tend to let the bit spin some in the hole right at the end. You can buy cups full of these bits anywhere that caters to construction professionals.

• Now this is a security bit set! It’s got 96 different bits, though actually most of the extra bit count is different sizes, not entirely different styles.

• This is absolutely without question the best bit holder ever made. The squishy rubber tongue is an amazing touch. If ever there was a reason for 3D printers and Etsy to exist, this is it.

• When ordinary Allen wrenches are not enough, these bits let you use your ratchet wrench handles to drive hex fasteners with great conviction. When I broke one of these on a stuck set screw, so much energy was released that there was a bright spark at the point of fracture. This is a lesson in why spark-proof brass tools exist for use where explosive gas may be present: hardened steel can and will spark when stressed to the point of failure, or just hit hard enough.

• Screwdriver Sockets let you turn big screws with ratchet handles.

• This screw extractor set combines a screw extracting bit and a matching drill bit on each bit.

• Assorted Screwdriver Bits

• These screw extractor bits have sharp ridges that bite into the stub ends of broken-off screws or bolts. With luck you can extract them that way, though you have to ask yourself why the head broke off in the first place. You may just succeed in breaking the screw farther down.

• Why not combine nut and screw bits?

• Nut Driver Bits

• Nut Driver Set

• For last-ditch extraction of broken screws or bolts, you can drill a hole down the middle of the screw, and then tap one of these into the hole. The sharp ridges are spiraled in the opposite direction from normal screw threads, so when you turn it counter-clockwise, the ridges grip and maybe rescue the screw. If not, well, you screwed it in, and now you’ve screwed it up, so basically you’re screwed.

• It was possible to get Philips bits that fit the Yankee handle, but you had to buy those as special add-ons. And chances are you didn’t have any Philips screws to use them with, if you weren’t working in a specialized industry such as aircraft construction.

• One problem with interchangeable bit screwdrivers is that they can’t reach deep into recessed screw pocket holes. For that you need a dedicated screwdriver, or a long bit.

• Basic bit sets will almost always have both slotted and Philips bits.

• This bits attempt to overcome the problem of slotted drivers sliding out of the slot. The spring-loaded sleeve keeps the bit centered.

• An oddly bent hex key.

• This flexible shaft lets you translate rotation of a screwdriver handle into rotation of a bit deep in some hard-to-reach place. It works with any standard hex drive bit.

• Phillips bits wear out. I went through a couple of boxes like this building my new shop space.

Do you have a better example of this kind of tool? Let me know by leaving a comment, and include a picture of it if you can so everyone can see!