Makita b-45733 Fast Cutting Thin Metal Grinding Wheel 125mm x 0.8mm x 22.23mm 5 Pack of 0.032 cm thick for faster cutting and reduced material waste, 60 grit for cleaner cuts, zirconia aluminum construction makes these wheels ideal for ferrous metals including stainless steel, ultra thin design requires less energy for improved battery life When used with the use with with Machines made of metal and stainless steel tubes with 5 inches. With 5 x Makita B-45733 Product specification: Thickness: 0.8mm, Size: 125mm, Bore size: 22.23mm.