Threaded taper from 6.35mm (1/4″) to 19.05mm (3/4″). Taper working length 65mm. Allows wheels to be stacked to required thickness. For use with buffing and wire wheels. 1/2″ left-hand threaded bore for connection to grinders. Threaded taper from 6.35mm (1/4″) to 19.05mm (3/4″). Taper working length 65mm. Allows wheels to be stacked to required thickness. For use with buffing and wire wheels. 1/2″ left-hand threaded bore for connection to grinders.