The Faithfull Vitrified grinding wheels are suitable for use on most types of bench grinder. White wheels are ideal for the general purpose grinding of ferrous metals but they are particularly suited for the sharpening of cutting tools such as chisels and plane irons. These wheels help keep your tools cooler to avoid overheating and weakening the cutting edge. Supplied with bore reducing bushes and will fit bench grinders The Faithfull FAIGW20025WG is a 200mm x 25mm vitrified grinding wheel suitable for use on most types of bench grinders. The general purpose grinding wheel can also be used for normal grinding of ferrous metals. The Faithfull FAIGW20025WG is supplied with bore reducing bushes and will fit bench grinders with the following shaft sizes: 31.75mm 19.05mm 15.88mm 12.77mm FAIGW20025WG