Prime-Line H 3522 Casement Operator, 8 inch Square Type, Right Hand, Bronze Product Description This casement operator features a hardened steel arm that is driven by a worm gear mechanism. The square body style includes a crank handle and a 3/8 in. spindle. Easily mounts on the right side of your window when viewed from the inside. From the Manufacturer This casement operator features a hardened steel arm that is driven by a worm gear mechanism. The square body style includes a crank handle and a 3/8 in. spindle. Easily mounts on the right side of your window when viewed from the inside. Features Left handed square body crank handle (viewed from inside looking out) Mounting holes are 3-7/8 in. and 4-3/4 in. on center Arm is 8 in. from middle of the guide button to the middle of the crank operator while closed Heavy duty diecast zinc construction with a bronze finish Steel worm drive gear for durability Matching crank handle is included USA SHIPPING estimates delivery times and we work to get your item to you as quickly as possible and within those times, but please know it may take slightly longer than the estimate.