【HIGH QUALITY】The MK2 -B16 self-tightening keyless lathe drill chuck is made of high quality alloy with fine workmanship, easy to grip. Ergonomic Design - Unique alignment allows torque to be applied around the handle for greater clamping force. 【EXCELLENT PERFORMANCE】Clamping range: 1-16mm；Record: MT2；The self-tightening keyless lathe drill chucks feature unique thrust bearings that help apply greater clamping force through the handle for secure operation. 【KEYLESS DESIGN】The self-tightening keyless lathe drill chuck is a keyless design that can be tightened and loosened by hand for faster and easier tightening and loosening. 【AUTOMATIC LOCK】During machining, the clamping force of the drill chuck increases proportionally to the cutting force. 【WIDELY USED】Suitable for drilling machines, milling machines, lathes, drill presses and electric hand tools, etc.