Good value for money. Quick-release chuck for craft and hobby use. For use on lathes, power routers and vertical drilling machines. Self-tightening and high-force clamping. No chuck key, tighten and release effortlessly by hand. Jaw opening 0.5-16 mm, jaws can be fully opened and closed without gaps. Concentricity 0.08 mm, B16 taper shank, internal taper DIN 238. For clockwise rotation.