Simple to use: The square hole drill bit adapter mortise tool fixing bracket has a straightforward design that enables quick installation or removal, streamlining your woodworking workflow. Professional grade tool: Engineered for precision drilling, this tool delivers professional accuracy for quality woodworking projects. Optimized for electric drills: Built for use with electric drills, it provides dependable compatibility and reliable performance during operation. Size and compatibility: Fits electric drills with an exposed clamping part width of approximately 20 mm and mortise hole diameters from 38 mm to 43 mm. Please verify dimensions before use. Durable construction and reliable performance: Designed to withstand regular workshop use while maintaining accuracy and steadiness in mortising tasks. Clear performance benefits: Helps achieve clean mortises with repeatable results, reducing drift and misalignment during drilling. Use scenario: In cabinetry or furniture work, create accurate square mortises for hinges, handles, or joinery to ensure solid fits. Use scenario: For door hardware installation or panels requiring square holes, align quickly with a reliable fixing bracket that matches common drill setups. Use scenario: In repetitive production or workshop environments, quickly set up and swap this adapter to speed up multiple identical mortises across parts.