The Endo Rescue bur RKT is an extremely fine drill that is placed over the previously marked fragment with the RKP bur and removes it by adhering to the drill due to the accumulated dentin debris inside. ISO: 101 - Maximum Revolution: 20000 rpm - Shape: Diameter 110 - Contra-angle Chuck 0 Grain Type: 0 - Application: Extraction Drill for Files - Packaging Quantity: 2 pcs