Contractor destroyed my 1/8" Bosch drill bit and then replaced it with another that wasn't Bosch. I ordered this immediately because I've found it's hard to say that these are the best quality hex bits for old home renovation projects where the wood is aged and almost as hard as stone.Cheap hex bits don't work well.Bosch bits work and I haven't killed one yet.I use them in a Ryobi 18V drill and a Bosch 12V drill.They always do their job.