The Big Horn 70154 Spring Loaded Corner Chisel is the ultimate tool for creating clean, precise 90° square corners in mortises. Perfect for installing hinges, latch plates, strike plates, and other hardware. Designed to square out the rounded corners left by router bits, this chisel works efficiently with just a single tap from a hammer, delivering professional-grade results in seconds. Its compact design features a 3/8-inch cutter edge, allowing it to fit snugly into tight spaces while self-aligning for maximum accuracy. The spring-loaded mechanism enhances efficiency, making it far quicker and easier to use than a traditional hand chisel. Built with a high-speed steel (HSS) blade, this tool ensures durability and precision, making it an essential addition to any toolbox for clean and accurate mortising every time.