This rail attaches to the base of your circular saw and rests against the wood edge, allowing for smooth, straight, parallel cuts-ideal for trimming panel edges and making repeat-width wood strips The adjustable clamping system fits circular saw base plates with a maximum width of 300 mm (11 in) and thickness under 8.2 mm (0.32 in). Suitable for most flat-base circular saws used in edge-guided cutting Features a quick-lock clamp on one end and a fine-tune screw knob on the other, enabling fast setup and precise adjustments. Prevents shifting during use for consistent, clean cuts every time Made from premium aluminum alloy, this tool is strong, rust-resistant, and built to last, while maintaining a lightweight 360 mm x 30 mm x 46 mm profile for easy handling and portability Clamp it to your saw, align with the material edge, and cut. No drilling or tools needed. Ideal for carpenters, hobbyists, and home project users looking to improve cutting accuracy and repeatability Color: As shown Material: Aluminum Alloy Specification: Package Contents: 1*pcs circular saw guide