1. Professional Woodworking Tool The 4 in 1 router groove bracket is a special tool made of upgraded thickened aluminum alloy for improved hardness, designed for fast milling of round grooves, cutting round blocks, engraving round centers and measuring right angle. 2. Removable design: The router milling groove holder has a practical and quick release design, easy to assemble or disassemble components. This increases the versatility of the device, making it adaptable to various woodworking tasks. 3. ENHANCED STABILITY AND PRECISION With its upgraded aluminum alloy construction and adaptive design, the tool provides improved stability in woodworking tasks. The precision achieved with this milling groove holder ensures accurate and clean results when working on different types of boards. 4. Trimming Machine Compatibility The aluminum alloy modular base serves as a versatile component that can be mounted on a trimming machine as a standalone base or coupled with a slot support for assisted edge milling and cutting round grooves.