TCT CUTTING EDGE: Tungsten carbide-tipped cutting edges last longer due to high level of endurance and can be run at higher rates and speeds which helps drilling conveniently with lesser effort. THREE BLADE DESIGN: This TCT hole Saw teeth are designed with Three-blade, Include outer blade, middle blade, and inner blade, making it sharper and more efficient, ideal for cutting hard metals. ADVANTAGES REASONS FOR CHOOSING THIS PRODUCT: Extremely sharp blade. Rust proof, Sturdy and Durable. Opening neat, smooth, no broken edges, no tremor phenomenon, chip easily. Sharp Carbide material teeth which provides longer service life. High capacity of endurance. The spring loaded pilot bit ejects the cut slug, saving time. No burrs during drilling thus giving a noise free smooth work-experience. HIGHER QUALITY: This power tool accessories is engineered for accurate operation. Quality tested to offer maximum durability and efficiency. Faster and Smoother with finest quality cutting results. CAN BE USED ON POWER TOOL MACHINERIES: Can be used on hand held drills, bench drills, magnetic drills, pneumatic drills and other rotating machine.