【Upgraded Double-Ground Teeth Hole Saw Set】14 PCS Hole Saw blades: 3/4" (19 mm), 7/8" (22 mm), 1"(25mm), 1-1/8" (29 mm), 1-1/4" (32 mm), 1-1/2" (38 mm), 1-3/4" (44 mm), 2" (51 mm), 2-1/2" (64 mm), 3" (76 mm), 3-1/2" (89 mm), 4" (102 mm), 5" (127 mm), 6"(152 mm). 【Accessories】2-Piece mandrels/arbor, 5-Piece drill bits, 1-Piece hex key wrench, 1-Piece installation plate. 【Durable Material, ‌Premium Surface】High carbon steel, spray coated, for rust resistant and wear-resistant, ultra sharp serrations for faster and cleaner cutting. 【Professional Woodworking】Ideal for softwood, plywood, plastic plate, plasterboard and thin PVC board. Cannot be used on hard wood, cement, glass, metal. 【Warm Tips】Can be used with electric drill, impact drill, If you need very precise holes, please use bench drill. Not suitable for cutting depths beyond about 1"(25.4 mm).