Easy to install and remove, this square hole drill bit adapter reduces downtime and keeps your woodworking workflow moving smoothly. An essential tool for both amateurs and professionals, it supports consistent drilling operations and helps you complete tasks with confidence. Specifically designed to work with electric drills, it enhances performance across a range of woodworking projects. Size accommodation: fits electric drills with an exposed clamping part about 20 mm wide and supports hole diameters from 38 mm to 43 mm. Please verify sizes before usage. Practical applications: Installing fixing brackets or hardware in cabinetry and furniture that require square holes. General furniture fabrication projects where precise square holes improve joinery and alignment. DIY repairs or upgrades that involve squarehole drilling and quick tool changes for efficient completion.