Product information "1:5 ZAMAC Gear: Metal 38lb Cap, 8mm SQ"
This Gear is used for manual operation of shutters with any 8mm square universal. The gear is placed inside the end cap and used to drive the axle manually in a shutter. With a 1:5 turn ratio, the rotation is heavy but quick. A sleeve connector attaches the gear to an end cap, holding it in place. This gear has a 38lb (17.2kg) lifting capacity. Comes with adapter (Part#6009)