- Simple to use: The square hole drill bit adapter mortise tool fixing bracket features a straightforward design that allows quick installation or removal, reducing setup time in woodworking. - Professional grade tool: Engineered for precision drilling, supporting accurate mortising and reliable results in professional projects. - Optimized for electric drills: Specifically designed for use with electric drills, ensuring compatibility and steady performance during operation. - Size support: Fits electric drills with an exposed clamping part width of approximately 20 mm and diameters from 38 mm to 43 mm. Please verify dimensions before use. - Use scenarios: - Drilling precise square holes for cabinet hardware, fittings, or decorative details. - Creating door hardware mortises or lock mortises in wooden doors. - Performing square-hole mortising in furniture joinery for stronger joints.