It is a Aluminum Alloy Tools/DIY Tools/Hand Twisting Drill/Mini Spiral Hand Push Drill/Hand Tools.Chuck Diameter: 0.6”, Hand Drill Length: 4.7”, Material: Aliminium Alloy & High Speed Steel Bit. Application: Mainly used for Model, Resin, Jewelry, Walnut, Amber, Olive Nut, Buddha Beads, Ivory, Nut, Plastic, Wood, etc.