Features: This is a small trim router adapter,the left side of the adapter connects to routers (fit perfectly with the router ),and the right of the adapter is perfectly for guide rail. The adapter can making precisely and straightly cut, and the part of the adapter in contact with the rail is smooth and flat without gaps, so it slides very smoothly and steadily on the rail. Use original screws from the factory base to mount the router adapter, no additional hardware required. Highly-density material (not 3D printing), sophisticated design, well-produced, smooth and flat of the adapter, the material is hard and resistant to damage, heat and cold. Experience stable connection between your router and guide rail with our innovative guide rails adapter. The smooth and flat of the adapter ensures highly performances, allowing for accurate and professional woodworking. Specifications: Material:Plastic+Stainless Steel Saw Guide Adapter Size:Approx.6.6x7.7cm/2.6x3.03in Hole Opener Width:Approx.35mm/1.38inch Package Includes: 1pc Track Saw Guide Adapter 1pc Hole Opener note: Please allow 1-2cm errors due to manual measurement,please make sure that you donot mind befores you order. Due to the differences between different monitors, the picture may not reflect the actual item color.