About This HSS Bi-Metal: High quality bi-metal material combined with high strength steel makes the hole saw higher hardness, wear resistant, tough, reusable and easy to use; Compatibility: Hole saw 2“ (51 mm) diameter with mandrel and drill bit for better stability and safety than a simple spring-loaded spindle; Smooth and Fast Cutting: The optimized teeth have less vibration and the sturdy drill makes your operation more stable and efficient. Widely Used: This hole saw is an indispensable tool for woodworking and decoration. Heavy duty for making holes in cornhole boards and ceiling lights, can cut holes in metal, gypsum board, wood, plastic, PVC. Warm Tip: Rotate clockwise and cut slowly to keep the pressure steady when drilling starts; Overview Material : Metal Brand : HYCHIKA BETTER TOOLS FOR BETTER LIFE Color : Red Number of Teeth : 2 Style : Industrial Item Thickness : 2 Inches Compatible Material : Metal UPC : 615272915978