Used to remove and install the Timken sprocket shaft bearing race in the left side crankcase. The Fast Eddy wedge spacer features small but strong magnets that keep the drivers in place while you slide in the driver handle. - Magnetic hold between drivers and wedge spacer - Super-easy to work with - No longer you have to try and hold them in with one hand while you slide in the driver handle - Made from heat treated US steel for reduced wear without becoming brittle. Note: Required 998377 driver handle with magnetic wedge spacer must be purchased separately