Torque Arm Bolt Circle Diameter 3.347 in Output Face Inside Diameter 2 1/2 in Overall Length 6.191 in For Use With 725 Series PowerStar Compatible Gearmotor Grainger Part Number 41C215 41C216 41C217 41C218 41C219 41C220 41C221 41C222 41C223 41C224 41C225 41C226 41C227 41C228 41C229 41C230 41C231 41C232 41C233 41C234 41C235 41C236 41C237 41C238 41C239 41C240 Arm Mount Hole Diameter 0.354 in Includes Mounting Hardware Yes Number of Positions 9