Model Number: BT30-13 Brand Name: Laite Key Specifications/Special Features: Features:1) This integrated design makes it impossible for the arbor and the drill chuck to become accidentally separated2) High precision and high gripping force, high reliability and stability3) Flimsy parts are shaped by quenching4) Self-tighting feature automatically increase gripping force proportional to increased torque to prevent toll shank slippage Modelclamping rangemounted way D L BT30-08 0.5-8 BT30 37.5mm 80mm BT30-13 1-13 BT30 50.50mm 110mm BT40-13 1-13 BT40 50.50mm 105mm BT40-16 1-16 BT40 57mm 110mm BT50-13 1-13 BT50 50.50mm 110mm BT50-16 1-16 BT50 57mm 120mm