Make it Snappy Tools 5/16 Inch x 3/4 Inch 3-Flute Flat Bottom Counterbore with TiN coated twist drill #34820

I like the counterbore for cutting a flat bottom hole, so my bolts don't extend out. Makes a clean cut. The 1/4" hex shaft makes it easy for using in the drill or an impact driver.

I use this to counter bore and through drill serving tray handles in one shot. Works like a charm! Fast and easy drilling. Would buy again if anything happens to the one I have.

I bought these to put holes/counterbores in PVC based siding for our new house. The installers were originally drilling the holes, then coming back later and picking up every piece again and drilling the counterbores. This made it a one step process which more than doubled thier output. Great little product. I actually then bought some very inexpensive drills ($50 each) and put them on a table, put these bits in and drilled 3 holes at the same time and paid for the drills in about 4 hours. Just had to think differently. These items did there job and saved me a lot of money.

Countersink holes for mounting frames.

This tool is sharp and cut nice counterbore holes in the Ikea particleboard I've been cutting. But this tool also did not come with any kind of tools too, so I needed to fabricate my own. I did like how the scraps cast nicely away from the cutting area, making this tool easy to use.

Pictued is a sample hole in a piece of maple. Both the cutters and drill do a great job. This was done in a drill press at 2500 rpm.Edit: also pictured is the corner block installation on a dining chair. This bit worked wonderfully well for this purpose.

I bought this bit for a deck project where I wanted the boards to be face-fastened, but hidden under matching wood plugs. This bit worked perfectly. It's razor sharp and makes an absolutely perfect counterbore. Do a practice run on a scrap piece first because if you drive too deep, you will gouge the face of your board, but once you get the hang of it, you'll know where to stop before going too far.

Makes perfect holes, with perfect recess, and made in USA. In the photo is a piece of hard maple that I drilled out for "crib" or "connector" bolts. I drilled the holes in the wood first, then I applied the stair tread tape, then I ran the drill bit IN REVERSE so it would not tear the tape. The tape does not have much of a shoulder, and I noticed it pulling when spinning in forward / clockwise motion. Holes came out so clean that it looks like factory work, and not something I completed in my kitchen.