Holemaker 7pc Silver Series Annular Cutter Set (50mm DOC) Brick & Tile Cutters 1000 covers per carton – innersole 1000 covers per carton – 10 packs of 100 sleeves Ductile iron yoke 05mm Kit Includes: 13mm x 50mm 14mm x 50mm 16mm x 50mm 18mm x 50mm 22mm x 50mm 26mm x 50mm Pilot Pin To Suit Description: M2AL HIGH SPEED STEEL MATERIAL M2AL High Speed Steel is a high alloy material with a hardness of up to 67 STEP HARDENED PROCESS This state of the art manufacturing process produces cutters with extremely hard tooth tips for increased cutter performance while maintaining a softer body which is less susceptible to breakage than standard high speed steel cutters