square hole drill bit adapter mortise tool fixing bracket Easy installation and removal: The fixing bracket allows quick installation and removal, enabling fast and convenient setup for woodworking projects. Professional woodworking tool: Designed for smooth and efficient drilling, this bracket is an essential tool for woodworking enthusiasts looking to enhance their craft. For electric drills: Specifically tailored for use with electric drills, ensuring compatibility and reliable performance during projects. Accommodates various drill sizes: Supports electric drills with an exposed clamping part approximately 20 mm wide and a diameter between 38 mm to 43 mm. Please confirm sizes before use. Practical use scenarios: Creating mortises for cabinetry and furniture joinery with improved stability and accuracy. Quick setup for repetitive mortising tasks across multiple panels in a workshop. On site or prototype work where fast, repeatable mortise drilling is required.