Square Corner Chisel Product Description Use this tool to square up the round corners left behind when routing hinge mortises. Hold unit in mortise corner and strike with hammer. Our chisel features a sharp 3/8” square hardened steel cutting blade. Manufactured by Whiteside Machine Company. TOOL SPECS: Square corner chisel with 3/8" square hardened steel cutting blade. SQUARE CORNERS: Perfect for squaring the rounded corners left after routing hinge mortises, ensuring clean and precise finishes. CHISEL: Chisel features a sharp 3/8" square blade made from hardened steel for clean and precise corner cuts. SPRING LOADED: Simply line up the chisel with the corner to be squared. Then, hit top lever with hammer to spring the chisel down, creating the square corner. HIGH QUALITY: Manufactured by Whiteside Machine, known for high-quality tools.