Bosch CC2430 Clic-Change 1/4 in. Self-Centering Drill Bit Assortment (3-Piece)

works as stated good quality

These are well made and work great...springs are even ground (which is proper and which you rarely see these days). Surprisingly still made in the US. Very minimal edge/burr cleanup to do and the drill bits are good quality. They'll break in with use but if you want to disassemble and buff the parts with fine scotchbrite, put a small drop of silicone oil in there, they'll be smoother right away. Spring tension is right where it should be. I've used these for several dozen holes and been very pleased with them. I started to do a lot of tiny #4 screws so I picked up the Snappy version for that one...it works fine but it's much stiffer and requires the special extra long drill bit replacements where these Bosch don't - they just use standard jobber length bits so they're simple to replace anywhere you can find them. I think these are better than the Snappy, maybe not quite as nice as the o.g. Vix but close. Looking at photos of broken bits and such I wonder if maybe some guys didn't adjust the bit depth correctly before use. The very tip of the drill bit should be resting inside the end of the nose cone but set in just a tiny amount, like 1/32". That way the cutting edge of the bit is inside the hole so there isn't any binding/jamming when the nose is depressed, but it's also back from the tip just enough to let you set firmly in the hinge hole before the bit contacts the surface. Not sure how that guy's spring got twisted up...really not sure how that could happen in use.

I JUST discovered these little gadgets! They are such a wonderful idea! When you have a number of holes to drill in the center of a metal hole (like hinges, caster wheel base etc...), these will drill you a hole (or at least. a pilot hole) 100% in the center every time with mindless ease! I remember futsing around trying to mark the center of the hole with a pencil and NEVER getting it right and getting frustrated! With this, you just put the right size in the drill and buzz! you're done!!! PErfect every time!

As you press the self-centering drill bit into a pre-drilled counter sunk hole on a hinge, the sleeve around the drill bit retracts and a 1/2" pilot hole is drilled. Once the pilot hole is drilled, you must follow up with a regular drill bit if a deeper pilot hole is needed. The items are well made and have the drill bit size engraved on the side of the tool. USA is engraved next to the drill bit size, but not sure if this means the tools are made in the USA. Didn't give a 5 star rating because the engraved bit size should be more legible and it's not easy to clear the wood shavings from the bit. I had to push down on the retractable portion and let it release a couple of times to eject the wood shavings, but doing so left some small cuts in my finger. Will use gloves next time.

I grew up in a cabinet shop, and I was helping my dad not long after I could walk. Here's the deal: I always started screws with a punch that you hit with a hammer. An old German carpenter that went through the guild system before the Second World War taught me to keep a bar of ivory soap in my tool belt. You punch a hole in the center of the butt, coat the screws in soap to lubricate the threads and prevent splitting face frames, and screw away... I used a Yankee screwdriver long before cordless drills became common. Years ago, I got a cheap self-centering drill bit, and chucked it into my (then) high-tech 14 volt cordless drill. The result was worse and slower than what I always did with a hammer. So, I went back to the punch, and I ignored the dirty looks that I got from other finish carpenters. I just figured their disdain for my trusty Stanley punch came from the same ignorance that made them ask me what I needed a coping saw for... Anyways, a couple of presidents have been in office since then, and I really like Bosch tools (I even buy Bosch brand kitchen appliances), so I decided to give it another try. I received these bits about a week ago, and I've used them on probably 2-300 hinges since then. I've gotta tell you, I'm a convert. They are as accurate as they are effortless to use. I have used them on everything from solid mahogany doors to hollow core doors to cabinet doors. They are sharp and they don't gum up with dust. Of course, you could just wing it, like all of the painters do when they put the doors back up. Your screws will all protrude at a funny angle past the face of the hinge, and the doors will all rub the stop in weird places... But, hell... Everyone else does them that way! Or, you could actually act like a real carpenter for once in your life and order these.

I saw this type of self centering bit being used on "This old House," so I though I would try them, I wish I had bought these years ago, perfect hole centering every time. I would buy this again as they are so useful.

Nice quality. I use them regularly and I'm happy w/ my purchase.

This is the first time I used one of these things, so I don't know how well they work compared to others, but these have worked flawlessly for me so far. What a difference it makes on mounting hinges. Totally awesome invention. I suppose my only "issue" is that I didn't get the set with the bigger ones too.