1、Adjustable Limit Block: The limit block of this parallel guide rail system is adjustable, you just need to loosen the big screw first, then loosen the small screw to adjust the limit block left and right. 2、Excellent Aluminum Alloy Material: This track saw guide is made of excellent aluminum alloy material, which is sturdy and abrasion resistant, not easy to be damaged, with rust and erosion resistant properties, while providing professional grade durability for long term use. 3、Large Screw Contact Area: The large screw contact area of this track saw guide rail joining set allows the wrench to pass through the predefined position of the screw without crimping the rail during operation. 4、Simple Operation: This track saw guide system backing is sleek and non jamming, when operating, the slicing is fluent and improves efficiency, with locking design, one key to fix the slicing distance and reduce the operation error. 5、Wide Application: This woodworking parallel guide rail system has a wide range of applications and can be used for woodworking, handcrafting, furniture processing, engraving, etc. It is very practical.