Countersink Drill Bit, Baban Countersink Drill Bit Set 6 Pcs 1/4'' Hex Shank HSS 5 Flute Countersink 90 Degree Center Punch Tool Sets for Wood Quick Change Bit 6mm-19mm

For the money I think these are great, I keep them in the truck and at the shop and in my tool bag, they are especially nice when a 2-1 drill bit and countersink don’t work

Did what I needed them to do but seemed dull right out of the bag. It was cheap enough for a one time use.

I used to use a bigger drill bit to countersink screws but these are so much easier to use

So dull you would think they were a used set, but they are definatly new with zero wear. Very poor quality control here. They dont even want to cut plastic let alone steel of any kind.

Es un buen producto, quizás no es de alta calidad, pero es bueno, por el valor que pague me parece que esta bien, por eso lo califico alto, me es útil y funcional.

Firstly, the titanium nitride (gold-colored) coating is entirely pointless. This is not a drill bit you're going to be using frequently to poke holes in metal. They add this for appearance, and there's already signs that it's wearing off. The best drill bits in my collection are just carbon steel.Second, these are not great at making round holds. Part of that is that this style of bit is intended for use by hand at low speeds, or in a drill press. But in a drill, there is a tendency (especially the bit isn't truly sharp) for it to bounce around, which leads to a pentagonal chamfer instead of a perfectly round one. If your plan is to create countersink holes in wood, look for the countersink bits that have the twist drill bit in the center. For best results, use a portable drill press with your drill.My recommendation on using this is to NOT chuck them up in your drill. Drill your hole first, then load them into a handheld bit holder. Then manually use your hand to carve out the chamfer. This has the added benefit of preventing over drilling. If you absolutely have to use the drill, select low speed.

Durable design, easy to use, multiple sizes is perfect for any application

These countersinks are actually as blunt as other people have described. The cutting edges have burrs hanging over them. They cut wood very poorly crushing and pushing it out of the way but actually did ok with metal where they can chip and dig in a bit. Thats was a surprising result for me.