Quantity: one set Specification: MT2-B16 Well-designed: card capacity 0-16mm; good metal texture, beautiful surface, easy to squeeze out corrosion; convex and concave, so the front cover can be handled efficiently and reduce hull shaking. Ease of use: Keyless design, manual tightening and loosening for faster and easier tightening and loosening; when machining, the clamping force of the chuck is proportional to the increase in cutting force Durable steel material: the quick release boring chuck is made of high quality 45 steel, strong and durable, with good precision and hardness.After special high temperature quenching treatment, it has long service life Generate: Unique alignment facilitates torque for greater clamping force around the handle ; widely used in a wide variety of drills, mills, lathes, drill presses and power hand tools