Features: 1) Contents: a) 9pcs hole saws: 3/4" (19mm), 7/8" (22mm), 1 - 1/8" (29mm), 1 - 3/8" (35mm), 1 - 1/2" (38mm), 1 - 3/4" (44mm), 2" (51mm), 2 - 1/4" (57mm), 2 - 1/2" (64mm) b) 2pcs arbors: i) 3/8" hex, fit: 14 - 30mm ii) 7/16"hex, fit: 32 - 210mm c) 1pc adapter: 1/2 - 20UNF ~ 5/8 - 18UNF d) 1pc drill: 1/4" x 105mm 2) HHS M3 / M42 bi-metal edge / alloy steel back 3) Cuts through stainless steel and other materials pipe, nail - embedded wood, hardwood floor, plywood and plastic Packing: plastic box