Do they make them in 5/8? On Widia's site it lists 1/2, 3/4, 1, and 1 1/4.It's actually Powdered Metal. Hanita touts it as harder than HSS and tougher than carbide. I always wanted to test a 5/8" version in a Maritool Dual Contact stubby side lock on a High Torque BBT. The 1/2" does pretty well for a lot of applications.