Right handed square body crank handle (viewed from inside looking out) Mounting holes are 3-7/8 inch and 4-3/4 inch on center Arm is 9 inch from middle of the guide button to the middle of the crank operator while closed Heavy duty diecast zinc construction with an aluminum finish Steel worm drive gear for durability Matching crank handle is included A Phillips head screwdriver is required for installation Please refer to the line art drawing for dimensions and compare with your needs before ordering 9in. Arm square body style includes crank handle Aluminum finish Mounts on left side of window when viewed from the inside Hardened Steel Drive Gears