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