21 pcs Center Drill Bit Set, AFUNTA Self Centering Hinge Tapper Core Hole Puncher 5/64'' 7/64'' 9/64'' 11/64'' 13/64'' 5mm 1/4'' & 1 Pcs Hex Key & 10 Pcs Replacement Drill Bits

I've only needed to use the 5/64th as of right now. I figured instead of spending all that money for a single Center Drill why not get a whole lot that has different sizes, being a hobby woodworker, I'll use them all eventually.It comes with 10 Center Drill bit housings, 10 Bits inside those, 10 Extra Bits and a Hex Wrench.The drawback of these is the wrench it comes with is a size to small, so you'll want to make sure you got another that will fit it. When you go to tighten the Hex set screw up, you can't tighten to tight or you'll spin the wrench inside the set screw then you'll have to drill it out with an easy out.So be sure to find the right size hex bit for it before tightening it to much.Works as they should. Bits are sharp and goes right through the wood. Little wiggle but it's expected with them being cheaper.I'd recommend for a "Budget Buy", it works good enough, centers perfect just pair it up with the hole size of the hinge before chucking into the drill.

These are great for installing hinges. Hinges no longer slip while being installed. The accuracy of placement is greatly improved. I’d recommend to anyone to install hinges

Make sure to get the bit size that fits the hinge (or whatever you centering) and just push in. I installed a 30" piano hinge and it stayed right where I put it using the centering bits.

Attractive bits but the ones I have used so far seem to be a little flimsy.

I never used these until the other day and now I won't go on the job site without them...

I use these for an odd application. To keep a drill bit centered in a broken off bolt hole, to extract broken bolts. You have to first drill a hole in a broken off bolt, for the extractor and these keep you centered and away from the treads. You need to replace the drill bits (these are a bit cheap) which is why they get a 4/5 stars, because even for wood, I would like better bits. I need bits that can drill into bolt-steel, but my application is not typical.

Excellent for intended use

It’s ok but the springs inside each bit weaken quickly and the whole purpose of the device is defeated and they become only usable as depth stops. They don’t seem to be repairable. You get what you pay for I guess