OCGIG HSS Countersink Drill Bit Quick Change Hex Shank Screw Chamfer Counter #6#8#10#12

good

Bad quality and not proper shape from the countersink

Attractive price, a bit unusual packaging (loose in a baggie). Impressive customer support: one of the four had a center shaft out of alignment with the hex shank, which caused the drill point to wobble (a lot: almost 1/4"). I tried re-drilling the shaft, no go. Vendor customer support had already sent courtesy email ("let us know...."), so I reported fault. In about 5--6 hours, I had a reply with an offer to either refund the whole purchase, or send a whole 'nother set of four, and in either case I'd not need to return the original order. Nice support.The drill bits are coated with what I presume is a preservative, which came off in mineral spirits.

When you read the words High Speed Steel, you think longevity. Unfortunately, not in our case thus far. The first hole I tried drilling, broken drill bit. Not a big deal since drill bits break all the time. Now a second countersink, off comes the flute of the c’sink, trash. Going forward, need to baby these items to make sure they last. Unless the last two c’sink’s last, I’ll order the more expensive c’sinks which has worked in the past. Needless to say, buyer beware.

These are very cheap less than one time use. Drill bits are soft, the set screw doesn't hold well, the bit is too small for the countersink body and doesn't hold true to center, and the countersink cutting edge is soft metal and will not hold an edge. This is typical china junk!

Fine for general use work, the drill bits are not entirely straight but OK for rough work.I misplaced my box of countersinks when we moved and did not want to buy another expensive set, thinking I would find them eventually. This is a good value for a general use set. The bits are not entirely straight but very functional for general use in a hand drill. I used these in soft wood and Alder until I found my other CS. I'll keep them for general all around use.

Observe the nub between the countersink part of the bit and the drill bit itself. Whatever that is, it screws everything up. I had to grind those bits off to get the bit to work at all. Even then, it doesn't work well. I have to push really hard to cut the countersink part. The bit and the wood get hot when I do that. I ended up buying a different set of bits and they work like a champ.