6-pk Diamond Coated Cutting Cut-off Blades Wheels dia. 7/8" #545 ROTARY DREMEL PROXXON Completely coated with fine diamond particles for working with hard materials. 6-piece Pack Without Mandrel replace for Dremel #545 THICKNESS: .024" BIT DIAMETER: 7/8" RYDER P/N 36-07266 Made in Mexico