Secure two linear motion shafts parallel to each other and the mounting surface to build a system that moves smoothly and doesn’t bind. These supports are made of aluminum, so they are lightweight and resist corrosion. They are machined to have flat, square surfaces, so they can be used to align other supports and parts in your system. Slide your shafts into the holes and tighten the clamping screws (not included). The clamping screws also mount the shaft support to your surface, so your surface must have threaded holes.