These Faithfull vitrified grinding wheels are suitable for use on most types of bench grinders. For tungsten carbide and non ferrous metals. Supplied with bore reducing bushes and will fit bench grinders with the following shaft sizes: 31.75mm 19.05mm 15.88mm 12.77mmSelect Option 150 x 20mm green grit16mm green grit200 x 20mm green grit25mm green grit Add to Basket Quantity