Features: High-quality aluminum-alloy material, with nice durability, wear and corrosion resistance, not easy to rust. Splicing type guide rail, you can adjust the length according to your needs, smooth movement, high accuracy and nice stability. The surface of guide rail with scale, clear and easy to read, bring more convenience to work, with strong practicality. Easy to assemble and use, it is a nice auxiliary tool for electric circular saw, engraving machine, slotting, etc. The tool set includes 4 x track guide(two each of 197-497/497-797mm), 2 x 375mm sliding strips, 4 x M-16mm screws, 4 x M-10mm screws, 4 x 17.8mm sliders, 2 x blue plastics plugs, 2 x stainless steel plugs, 1 x screwdriver, 1 x wrench, 2 x 63mm sliders, 2 x 153mm sliders, 2 x link boards, 4 x limit stops. Specifications: Color: Red Material: Aluminum-Alloy Scale: 197-797mm(600mm) Package Size: 410 * 290 * 80mm/ 16.1 * 11.4 * 3.1in Package Weight: 1760g/ 3.9lb Packing List: 4 * Track Guide 2 * 375MM Sliding Strips 4 * M-16MM Screws 4 * M-10MM Screws 4 * 17.8MM Slider 2 * Blue Plastics Plug 2 * Stainless Steel Plug 1 * Screwdriver 1 * Wrench 2 * 63MM Slider 2 * 153MM Slider 2 * Link Board 4 * Limit Stop