Sherline Spindle Handwheel mounts on the end of the spindle shaft and looks and works much like a sewing machine handwheel. It allows the operator to quickly and safely stop a rotating spindle by hand. It also makes it easy to hand index the spindle when working on a part. A black oxide finish was not used, because the smooth, machined surface offers a better feel on your hand. 2049 Sherline Spindle Handwheel Instructions