Feature:  1. This linear guide is suitable for installing most electric circular saws.  2. The 7-inch aluminum base can be installed with 5-6-7-8 inches, and the length of the electric circular saw base plate is not greater than 345mm.  3. 9-inch aluminum plate base can be installed 9-10 inches, and the length of the electric circular saw base plate is not greater than 425mm.     Specification:  Size: 150 x 26 x 13cm;  The width of the middle groove: 15.7mm;  The height of the middle groove: 12.5mm;  Weight: 7kg.  Maintenance:  After the work is over, clean the sawdust on the tools and wipe them with a towel. If you do not use it for a long time, you can rub a little anti-rust oil on the metal parts to prevent the tools from rusting. Do not use volatile oil, gasoline, thinners, polishing powder, etc. for cleaning.     Note:  1. The electric circular saw in the picture is not included   2. Please allow slight 1-3cm difference due to manual measurement and a little color variation for different display setting. The pictures are only for reference, please make the object as the standard. Thank you for your understanding      Package Included:  1 X Double-layer Guide Rail 1.4m;  4 X Pressure Block;  1 X Explosion-Proof Block;  2 X Liner;  2 X Limit Button;  2 X Rail Clamp;  1 X Positioning Rod;  1 X Special Aluminum Bottom