Century ARB2026SV1 1/4 HP 1140RPM 48Y TEAO 1/60/115/208-230 For Use With AC35 Magnetic Drill Press Converts Mag Drill From Annular Cutter Use To Twist Drill Use Accepts Twist Drills With Shank Size Up To 1/2 In. Twist Drill Capacity: Up To 3/4 In. Diameter