Idong 13PCS Bi-Metal Hole Saw Sets with Arbor and Pilot Bit, 18mm-75mm Hole Cutter Set, Drill Bit for Cutting Wood, Plywood, Plastic, Drywall, Thin Metal Sheet, Ideal for DIY Projects & Workshop Tasks

【Top-Tier Durability】Crafted from premium M42 alloy, our bi-metal hole saw boasts a surface that outperforms conventional alloys in toughness. With an impressive hardness rating of 65–66HRC, it delivers long-lasting durability and reliable rust resistance. The cutting teeth are reinforced with a high-speed steel coating, boosting hardness and wear resistance for exceptional cutting performance.
【Swift & Precise Cutting Performance】Carbide-infused construction boosts our hole drilling cutter’s hardness, while precision-engineered tooth geometry enables ultra-fast cutting. Its high-speed steel blade features impact-resistant teeth that prevent tooth loss, delivering accuracy far superior to standard models with diameter deviation under 1mm.
【Effortless Operation】Our hole opener kit features a smooth-edge design for unimpeded, rapid cutting. Upgraded chip evacuation holes clear debris instantly to prevent jamming and workpiece cracking. The built-in spring-loaded drill bit automat