Features 1、Cast by high quality metal, wear resistant and anti-impact. 2、Polishing surface features anti-oxidative, waterproof and anti-corrosion. 3、Fine workmanship ensures its stable performance and long service life. 4、Equipped with chuck key to adjust the chuck to proper tightness. 5、Easy to mount, applicable for drill machine, electric drill, etc. Specification Features: 1. Cast by high quality metal, wear resistant and anti-impact. 2. Polishing surface features anti-oxidative, waterproof and anti-corrosion. 3. Fine workmanship ensures its stable performance and long service life. 4. Equipped with chuck key to adjust the chuck to proper tightness. 5. Easy to mount, applicable for drill machine, electric drill, etc. Specification: Material: Stainless steel Item Type: Electric drill chuck Clamp Range: 3-16mm Drill Chuck Size: Height: 6.5cm/2.56in, hole diameter: 1.6cm/0.63in Chuck Key Size: 9*4.8cm / 3.54*1.89in Weight: Approx. 575g/20.3oz Package list: 1 * Drill Chuck 1 * Chuck Key Package List