HP bur shanks are 44.5 mm long, providing the extra length needed for use in large companion or domestic animals and exotic animals. HP burs are used in the low speed handpiece fitted with a 1:1 straight nose cone The handpiece, SNC 1:1 and HP bur can be autoclaved. These large burs can drill through thick bone for surgical, orthopaedic and endodontic work. the 10 HP burs are supplied in an autoclavable holder. Made in the USA.