Uses: Suitable for pistol drills, bench drills, vertical drills, etc. It is widely used for opening holes in panel holes, logs, galvanized pipes, fire hoses, plastics, gypsum boards, etc. Heat-treated M42 bimetal hole saw: Made of high-quality HSS carbon steel and bimetal steel, with sharp edges and high hardness. Rust-proof, wear-resistant, long service life. Cutting design: This hole saw adopts a clean, non-binding edge design, which is easy and convenient to cut. Impact resistance, sharp teeth, low vibration, fast drilling, improve drilling efficiency. Equipped with a central connecting rod: For your convenience, we provide a central connecting rod. Assembly is quick and easy. M42 Bi-Metal Hole Saw with Hex Adapter and Center Drill for Plastic Sheets, Pipes, Wood (38-114mm) High-speed steel teeth for fast and clean cuts offer advantages of high performance, rust protection, and durability. Fast cutting with ultra-sharp serrations for faster and cleaner cutting, high precision, smooth cutting edges, much more durable and can provide a longer service life. Professional pipe opener, widely used in galvanized steel pipes, fire hoses, oil pipelines, shipbuilding, and other industries Sharp Teeth/Saw Blade The blade teeth are sharp, the vibration is small, and the hole can be quickly balanced when the hole is opened and operated is stable High chip removal efficiency Spiral chip flute and multiple chip hole design to improve chip removal speed Hexagonal shank and center positioning drill Effective anti-slip, clamping is more stable, firmer, and not easy to slip Center positioning drill, concentric degree accuracy, auxiliary positioning, no deviation. Delivery quantity: 1 piece becomeveryrich