【Premium Quality】 The circular hole saw is made of high-quality M42 and rust-proof bimetal. It has high wear resistance and high impact resistance, the hardened groove ensures a long service life. 【Professional and Highly Efficient】 The hole cutter with mandrel has ultra-sharp teeth for faster and cleaner cutting. Because the right size is always important, the saw also delivers a smooth edge with high precision. 【Sturdy and Durable】 The metal hole saw has a high level of heat resistance and is wear-resistant. It vibrates little while working. Compared to conventional variable-tooth hole openers, the service life is increased by 30%. 【Wide Range of Applications】The drill bit is suitable for drilling holes in desks, doors, furniture and cabinets, handles and locks for furniture installation. With a built-in drilling pin, it is possible for mild steel, stainless steel, cast iron, brass, aluminum and wood materials.