High Torque MotorsQuartz High Torque clock motor will operate our Extra Long I Shaft Hands from 8" to 17 1 2". Requires one AA battery. Size 2 1 4" square x 5 8" thick. Use for new build or repair.. hands cannot be longer than 17 1 2" and must be counterbalanced lightweight hands. The 8" to 17 1 2" hands we sell are are compatible. We cannot be sure if your existing hands will work. Order hands separately. Hands are not supplied free of charge with this motor. Threaded