Prime-Line H 3710 Prime-Line H-3710 Left Hand Square Casement Operator, 3/8 in Di Spindle X 9 in L Arm, Diecast Zinc, White Product Description This casement operator features a steel constructed arm that is 9 in. long. The square body style has a 3/8 in. diameter spindle and includes a crank handle. Easily mounts on the left side of your window when viewed from the inside. Used on steel framed From the Manufacturer This casement operator features a steel constructed arm that is 9 in. long. The square body style has a 3/8 in. diameter spindle and includes a crank handle. Easily mounts on the left side of your window when viewed from the inside. Used on steel framed 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 9 in. from middle of the guide button to the middle of the crank operator while closed Heavy duty diecast zinc construction with a white 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.