Professional Treatment System For Hyperkeratotic Tissue And Hypertrophic Nails. Through the exclusive bonding process, which permanently bonds diamond to the bur surface, Premier burs offer unsurpassed product life and performance! More efficient than steel or carbide instruments and with greater patient acceptance because of reduced heat generation. All diamond burs fitted with 3/32€ shaft size. Both cold sterilization and autoclaving are equally effective. Should be cleaned after each use.