This casement window operator is a left-handed aluminum square body type. It has a 9 in. steel arm with a round disc on the tip. It is a worm gear driven by a 3/8 inch crank spindle. The matching crank handle that fits onto the crank spindle and installation screws included. Mounting holes available are 3-7/8 and 4-3/4 inches on center. left handed square body crank handle | mounting holes are 3-7/8 in. and 4-3/4 in. on center | arm in 9 in. from middle of the guide bottom to the middle of the crank operator while closed | heavy duty diecast zinc construction with an aluminum finish.
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