Drill multiple sized holes with one bit; no pilot hole needed. Steam oxide finish. For use on metal, steel, copper, brass, aluminum, wood, plastic, and laminates. Unique split tip design. Double flute construction. Maximum material size: 10 gauge.Chuck Size: 3/8″. Length: 3 1/8″.6 Holes: 7/8″, 1 1/8″, 1.2″, 1 7/32″, 1 1/4″, 1 3/8″.