Steel Dragon Tools MD13 Magnetic Drill Press with 1/2" Boring Diameter and 1910 LBS Magnetic Force Suitable for drilling on any metal surface. Motor: 650 W, 110 V, 50/60 Hz Maximum Magnetic Force: 1,910 lbs. (8,500 N). Thinner metal will result in less force. Maximum Boring Diameter: 1/2 in. (13 mm). Maximum Boring Depth: 5-1/2 in. (140 mm) Tool Holder: Screw-type chuck with 1/2-20 UNF and 3/4 in. Weldon shank adapter.