It is a Aluminium Alloy Tool/Drill Tool/Hand Drill/DIY Tools/Spiral Hand Push Drill. Chuck Diameter: 0.6”. Material: Aliminium Alloy Hand Drill & High Speed Steel Twist Bits. Application: Mainly used for Model, Resin, Jewelry, Walnut, Amber, Olive Nut, Buddha Beads, Ivory, Nut, Plastic, Wood, etc.