Product Description Hole Cutter Kit, Primary Material Application Metal, Materials Cut Steel Plate, Arbor Design Included, Tooth Material Carbide Tipped, Number of Teeth Hole Cutters Only 4, Max. Cutting Depth 1/8 in, Impact Rated No, Hole Cutter Sizes Hole Cutters 7/8 in, 1 1/8 in, 1 3/8 in, Saw Size Range 7/8 in to 1-3/8 in, Number of Hole Cutters 3, Shank Size 1/2 in 3 Flat, Pilot Drill Size 1/4 in dia x 2-3/4 in L, Number of Pieces 5 For material up to 3/16 thick. Heavy-Duty Carbide Teeth cut fine holes in stainless steel or structural steel studs. Improve production in brass, aluminum and other thin sheet materials. Use arbor No.49-57-0035 sold separately. From the Manufacturer For material up to 3/16" thick. Heavy-Duty Carbide Teeth cut fine holes in stainless steel or structural steel studs. Improve production in brass, aluminum and other thin sheet materials. Use arbor No.49-57-0035 (sold separately).