... 1. TCT Annular Cutter, with unique types geometry and random-space tips provide clearly cutting, fast feed ... rate, less vibration, smooth hole surface and long tool life, the effective of drilling is ... or pipes;4. Weldon shank,One-touch shank,FEIN Quick-IN shank,Thread shank;5. One-touch shank, suitable for all ... designed as one-touch types to be mounted and removed without the use of a tool; ...