Model Number: Stock Guide - Our Stock Guide model is crafted for superior performance in guiding and controlling wood stocks. It features an innovative elastic one-way wheel system that prevents the wood from rebounding, thus enhancing your safety and the accuracy of your cuts. High-concerned Chemical: None - Our commitment to your health and safety is paramount. This tool contains no high-concern chemicals, ensuring it is safe for both you and the environment. It's an eco-friendly choice for your woodworking needs. Color: As Shown Material: Aluminum Alloy Package Contents: 1*Adjustable Roller Guides 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.