Review on CSK SET 5 82 Degree Countersink - Champion 5 Piece Kit by Phil Casey

Given that this set of five countersinks costs less than a good one I would say this is a very good price. I've used several of these for reaming aluminum and steel tubing. They cut a good angle very quickly and don't leave burrs or chatter (like the "regular" knurled countersink). In fact, I even used a large countersink with a very slight "pop" to instantly deburr the holes. They are also very stable in a hand drill. Can't comment on durability yet (I've probably only drilled about 20-30 holes), so if the price reflects a downside to these bits, it's probably their durability. 0.82 degrees is the standard relief angle for SAE countersunk machine screws (referred to as "pan head” screws by those who work with fasteners). Metric pan head fasteners are (usually) countersunk for a 90 degree countersink. The bin is cheap and probably not intended as an everyday organizer (just enough to keep the pieces from ruining each other in transit). .