1. Individual Bi-metal Hole Saws: Material:M3 High speed steel Bi-metal Cutting Diameter:14mm-210mm Cutting Depth:up to 38mm/44mm. Recommended with excellent performance for cutting steel and cast iron pipe, steel plates, aluminum, copper, brass, stainless steel, wood and plastics. 2. Bi-Metal Holesaws Sets in aluminium case: 9pc Plumbers Set in aluminum case:3/4"(19mm), 7/8"(22mm), 1-1/8"(29mm), 1-1/2"(38mm), 1-3/4"(44mm), 2-1/4"(57mm), Arbor 98003, 98010, Adapter 98012. 9pc Electrician Set in aluminum case:7/8"(22mm), 1-1/8"(29mm), 1-3/8"(35mm), 1-3/4"(44mm), 2"(51mm), 2-1/2"(64mm),Arbor 98003, 98010, Adapter 98012. 13pc Handyman Set in aluminium case: 3/4"(19mm), 7/8"(22mm), 1-1/8"(29mm), 1-3/8"(35mm), 1-3/4"(44mm), 2"(51mm), 2-1/4"(57mm), 2-1/2"(64mm), Arbor 98003, 98010, Adapter 98012, Drill 98015. 16pc Combination Set in aluminium case:3/4"(19mm), 25/32"(20nm), 7/8"(22mm), 1"(25mm), 1-1/8"(29mm), 1-1/4"(32mm),1-3/8"(35mm), 1-1/2"(38mm), 1-3/4"(44mm), 2"(51mm), 2-1/4"(57mm), 2-5/8"(67mm), 3"(76mm), Arbor 98003,98010, 12" Extension 98013. More details are available, please contact and inquire us.