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 use, 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 use, applicable for drill machine, electric drill, etc. Specification: Material: Iron Item Type: Electric drill chuck Clamp Range: 0.6-6.5mm Drill Chuck Size: Height: 4cm/1.57in, hole diameter: 6mm/0.24in Chuck Key Size: 5.5 x 3.3cm / 2.16 x 1.30in Weight: Approx. 126-128g / 4.4-4.5oz Package list: Package List