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This casement operator features a 9 in. steel constructed arm driven by a worm gear mechanism. The square body type boasts a 3/8 in. diameter spindle. Easily mounts on the left side of your window when viewed from the inside. This casement operator features a 9 in. steel constructed arm driven by a worm gear mechanism. The square body type boasts a 3/8 in. diameter spindle. Easily mounts on the left side of your window when viewed from the inside.

