Type 1 shape for square burr-free cutting Patented 3M Cubitron grain formulation outlasts standard aluminum oxide wheels Externally reinforced with fiberglass layers to provide ultimate safety in a thin wheel Wide range of sizes available to fit both right angle grinders and circular sawsThin .045 width Use with reusable 5/8-11 adaptor to fit right angle grinders Combines fast cutting with extremely long life Stainless steel high tensile alloys Ferrous and/or non-ferrous metalsNote: Reusable 5/8-11 adaptor for use on Type 1 and Type 27 reinforced wheels with a 7/8 arbor a max. diameter of 5" and a wheel thickness of .045 to 1/8"