All surgical burs have a 2.36mm shank (HP fitting) and will fit in all high speed surgical bur machines e.g. 3M's Minos, Halls Surgairtome and Dremel. All are single pack and non sterile. In human surgery burs are regarded as disposable items. In veterinary surgery the cost precludes using burs as disposables. However, use of burs which are less than sharp extends procedure time and creates heat. We do advise that burs are checked and changed on a regular basis. Diamond burs are sharper and create less heat that carbide equivalents. Adequate irrigation is essential.