🔩 Driak Titanium Coated Materials Drilling: Enhanced Precision and Durability Review

This large stepped drill bit works well until the work gets tough, after which the drill bit hangs in the hole and the shank spins in the chuck. Other step drills of this size have a "triangular" shank, meaning there are three flats on the shank to allow the drill chuck to engage. You must select one of these bits instead.

So far I've cut several 2" holes in 1/4" aluminum and steel siding. It takes a while to drill through aluminum with a power drill, but with patience I can make smooth, round holes. .In thin steel with a hand drill he suddenly grabs and pulls deep so hold on tight and go slow. A quick bite deforms the steel at the edge of the hole. I can't even begin to estimate how long this will stay sharp, and I highly doubt it could be sharpened for less than its $25 purchase price. The holes I need in…

The package I received is far from what I saw in the product description. see such a case. Second, the Revain website photo shows there are five of these, but I only received three of them. Another point is that the disk bits I got are not step bits. Instead they are progressive bits (see photo). This means that the size of the hole will increase gradually, not incrementally. Overall I still think it's worth buying as there is a large piece in the package which is quite expensive when you buy…