Features: 1. 2-in-1 Functionality: This tool offers a combination of a table card tenon stopper and a protractor assist clamp. This dual-head design provides enhanced practicality for a variety of woodworking applications. 2. and Portable: Our table card tenon stopper and protractor assist clamp are designed to be and small, making it a convenient tool that you can carry with you wherever you need to woodworking. 3. Wide Compatibility: The table card tenon stopper has an adjustable diameter of 20mm and can be easily adjusted to fit a variety of workbenches, tables, and other woodworking surfaces. 4. Adjustable Angle Clamping: Our tool includes a triangle ruler marker that allows you to safely select the desired angle, ensuring accurate angle measurement every time. 5. Easy Marking: Once the angle you want is firmly clamped, you can simply draw a line with a pen or marker, ensuring woodworking precision without measuring twice. Specifications: Available Size: 20mm Compatible Surfaces: Workbenches, tables, and other woodworking surfaces. Function: Table card tenon blocker and protractor auxiliary clamp Colour: Red Material: Aluminum Alloy Package Contents: 1 x Stair Gauge Auxiliary Clip Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.