Review on Shank Drill Countersink Metric Combination by Dustin Miller

Bought to assemble an amplifier stand for a car audio system. Works great with ABS plastic. The learning curve isn't very steep, just make sure you turn the bit carefully so you don't tangle the strings. I don't recommend using this for threading blown PVC, the filament just doesn't hold up very well. You'll do better with T-nuts or some other insert.