HSS Bi-Metall hole saw blade with a center drill and tool holder - Construction and materials: The hole saw blade is made from high quality HSS (high speed steel) for sharpness, corrosion resistance, wear resistance, and durability. The center drill and tool holder are made from high quality M42 steel, offering excellent machinability and toughness. - Superior performance: The robust HSS structure is electron-beam welded to maximize cutting power. The sharp HSS teeth cut effectively through metal, wood, cornhole boards, PVC boards, plastic and drywall with clean, smooth and highly precise results. - Easy to use: The 152 mm diameter hole saw includes a center pin and drill bit for greater stability and safety compared with a simple spring-loaded spindle. It fits all 1/2 inch bits and drills up to 40 mm depth. To assemble, rotate the center pin and the hole saw until very close (no need to force tight), align the securing pins with the hole in the hole saw, and screw them tight. - High efficiency design: Optimized teeth reduce vibration and the stable drill improves operating stability. Deep side irons on the sides of the hole saw promote fast chip removal, and the bottom functional slot simplifies removal of plugs, reducing time and effort for chip removal. - Size and compatibility: 152 mm diameter hole saw with center drill and tool holder; compatible with all 1/2 inch bits and drills up to 40 mm depth. - Practical use scenarios: - Woodworking and DIY projects such as making cornhole boards, producing clean holes in plywood or solid wood. - Metal, PVC, plastic, and drywall applications where large, precise holes are needed. - Home improvement tasks requiring reliable, durable hole cutting with stable guidance and easy chip removal.