1. Adjustable angle: The composite arc adjustment tool features a userfriendly design that allows for angle adjustments at various positions. This ensures the bow remains vertically fixed, enhancing the accuracy of sheet alignment. 2. Precise adjustment: By rotating the screw, the right angle of the bow and arrow can be easily finetuned to meet your requirements. This function guarantees that the bow and arrow maintain a vertical angle while staying securely fixed, enabling flexible adjustments when needed. 3. Secure fixing: The bracket is equipped with three mounting screw holes, allowing it to be firmly attached to a table or workbench. This ensures stability and comfort during operation, making it convenient to use the composite arc adjustment tool. 4. Materials: Crafted from quality metal, the parallel vise ensures durability and long service life. Its robust construction guarantees reliable performance and extended usability.