Durable workmanship ensures long service life and reliable performance. Compatible with lathe, electric drill, milling machine, and similar equipment. Includes a chuck key to adjust the chuck for proper tightness and secure tooling. Metal cast construction provides wear resistance and impact resistance for demanding use. Use scenarios In a small metalworking , mount a tool or workpiece on a lathe and tighten the chuck with the included key to prevent slip during turning. On a drill press or handheld electric drill, install bits and use the chuck key to achieve secure tightening for accurate drilling and reduced wobble. On a milling machine, fit cutters or tooling and adjust tightness with the chuck key to maintain stability and consistent material removal. Attributes Function: chuck with adjustable tightening via included chuck key Compatibility: suitable for lathe, electric drill, milling machine, and similar equipment Material: metal cast construction Performance: wear resistant and impact resistant for durable use