Contains cobalt HSS tooth material for heat and wear resistance, along with a 5.5tpi positive rake tooth design for fast, smooth cutting. Specifically designed to cut stainless steel, metals and mild steel sheet, but also cuts through wood, plastic and other materials. Recommended cutting depth up to 3mm (1/8"). Cuts Stainless & Mild Steel Sheet, Tubes, Wood, Plastic & Plaster Steel Slotted Barrel to Aid Removal of Debris 16mm - 76mm Dia. Holesaws For Use with 3-Jaw Chuck Machines on Rotary Action Cuts Stainless & Mild Steel Sheet, Tubes, Wood, Plastic & Plaster Steel Slotted Barrel to Aid Removal of Debris 16mm - 76mm Dia. Holesaws For Use with 3-Jaw Chuck Machines on Rotary Action