VEXpro Linear Motion Hardware - VEXpro 217-4400, The VersaFrame Roller Chain Mount provides a simple yet effective method of directly attaching structural parts to #25 or #35 chain.In tandem with the linear motion gusset plate set, order code 70-3382, these components can be used to create elegant linear elevators and other moving sub-systems.The VersaFrame is a construction system that allows teams to build an upper frame in whatever configuration they can imagine. Pre-drilled holes on a standard 1in. pitch are designed to be used with #8 screws and 5/32in. rivets, and can be easily drilled out for larger hardware. No need for precision fabrication capability - with just a saw and a drill, any team can build light-weight world-class frames. VersaFrame linear motion gussets allow for seamless integration into designs incorporating lifts or other motion elements. VEXpro 217-4400 VersaFrame Roller Chain Mount 2 pack