Drill a hole and tighten it in two steps. Not only suitable for 90-degree angle, but also suitable for 45-degree saw. When screwing or gluing the circuit board at an angle of 90, please fix the auxiliary equipment for corner and T-connection. Made of high quality materials, and long service life. Suitable for woodworking, cabinet and furniture maintenance and connection, photo frame reinforcement, wooden DIY projects, etc. describe: Name: Woodworking Right Angle Clamp Material: plastic colour: orange+black Package Contents: 4 x Woodworking right-angle clamp 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.