Countersink Drill Bit (7 PCS), Drill Bit Set with One Hex Key, High-Speed Steel Drill Adjustable Carpentry Reamer Plated for Wood DIY (3-10mm)

This review is for the Countersink Drill Bit (7 PCS). This listing keeps iterating over different products.The Countersink Drill Bit set has several design flaws. 1) The bits are not tapered, so the same diameter whole is drilled end-to-end. If you look at your regular screws, the end is tapered. You want a tapered bit. 2) The retaining screw that keeps the countersink part attached to the shank is useless. It stripped immediately. 3) The shank is too short. If you are using a regular #8 1-3/4 screw, you want a shank longer than ~3 inches, to allow for the countersink and the minimum length to attach the bit to your screw.On the positive side, the brads at the end of the bit are useful. Not worth the cost that I paid for the set, but you live and learn.

I bought these specifically to countersink 1/4" thick tongue-in-groove cedar that I was using to line a freshly-built chest constructed of poplar. About 50 hole punches into the job, the bit broke. I had no choice but to go up to the next size to finish my project.The product description advises to use a bench drill. Obviously, working inside of 40" x 18" chest, that is not an option. Ironically however, the work inside the chest went on without event. The bit broke while attaching cedar to the chest lid, which was upside down on a bench top.I suppose that breaking tiny bits just goes with the work but I did not expect it going into soft wood.I received one those nuisance inquiry emails from the seller, on day after the purchase arrived, advising they were sending an extra set of bits as a FREE GIFT. I had not complained yet so who knows what prompted the gesture unless broken bits are an ongoing problem. I can suck up an occasional broken bit but replacements bits, with the specially designed tips might a bit difficult to find.In spite of all of my whining, these did the job. I have some right fine looking countersunken screws, with assistance of glue, holding cedar lining into place. This cedar will split in a blink without adequate pre-drilling. These bits give that pre-drilling a nice finished look.The price made the set a pretty good value, too.UPDATE: The new set of bits that the seller promised via their own self-initiated email have not arrived in two months so it seems pretty certain that they are not coming. Star rating has been adjusted accordingly.

This is what I get for buying solely based on price. Even for an item that I rarely use, I surely thought I would get more than one session out of the bit I used. Talk about poor craftsmanship! Not only did the drill bit shear, but it bent into a curl. I've broken bits before but never made them curl. What kind of soft metal was used in making these pieces of junk?!?!?! Not only was the drill bit poorly made, but the countersink attachment kept loosening. Therefore, the drill bit would spin, but the countersink attachment would sit still. I had to keep trying to tighten the the attachment onto the bit, but the internal socket head screw started to wear out. Its probably made from the same soft metal as the drill bit. DO NOT BUY!!!

Needed these quickly and didn't have time, due to work, to go buy quality locally. The drill bits are very weak and not particularly sharp. Considerable amount of flex in the drill bit shaft leads to potential for inaccurate drilling of countersunk holes. Would never use these on anything but the softest of woods.

I ordered the drill bits on a lightning deal thinking I would get a deal. These are not a deal. I gave them 1 star because the plastic case would be useable for something and was better quality than the drill bits. The cutting edges were jagged & nicked, the tips were not true, and the surfaces were burnt. These didn't appear to be able to make through one use. I returned them for a refund. Don't waste your time don't buy them.

This was purchased on a flash sale. I know it was cheap and I bought it cheap, but the screws have stripped out, and the bits are not really sharp to begin with. I wouldn't buy another set. If you just need to drill a couple of holes and that is your plan then this is a nice disposable set you won't miss if they come up missing.

The smallest bit bent and cut into my finger on the 2nd hole into plywood I was making today. Had to replace bit with one of my other bits. Collar still fit but wasn't staying in place as well. The first and next 3 or 4 holes went fine. Bit shouldn't have bent on ply wood. Work was supported, no beyond expected forces were applied.

The 1/16" (or whatever size it was) bit with countersink worked great for the first 15 or so holes. Then the tip wore off and then the bit broke. Replaced it with a bit I've had for years and it wobbled in the countersink.On this set, the bit is what the drill chuck grabs, not the countersink. I've seen and used countersinks where the countersink is chucked into the drill and the bit rides in the center of the countersink. This is a poor design and nearly worthless! Buy a name brand!