It is a Hand Tool/Hand Twisting Drill/Wood Tools/Spiral Hand Push Drill. Chuck Diameter: 0.6”. Material: Aliminium Alloy Hand Drill & High Speed Steel Bits. Application: Mainly used for Wood, Resin, Jewelry, Walnut, Amber, Beeswax, Olive Nut, Vajra Bodhi, Beads, Ivory Nut, PVC, Acrylic and Plastic etc.