Decent set of cheap home drill bits, suitable for wood, plastic, leather or drywall. I have tried using them on metal (mild steel, 1/8" shank) and they will drill a hole - once - and yes I have used lube and proper drilling techniques. If you are looking for an inexpensive kit for small jobs these are great as they are inexpensive and interchangeable. The case is fine and will work for keeping them together in a tool box at home and it's nice that they have 2 bits 1/16" and 1/8" as they will be used all the time!