goRAIL is so much more than a structural component. While at a glance the outer profile is square, the corners follow a 32mm diameter for use with 32mm bearings. The bore of the goRAIL has a unique combination shape derived from a 14mm diameter circle and a 12mm square. Utilize this bore by sliding flanged bearings in each end of the goRAIL to support a shaft, or create linear motion by inserting a 12mm square lead screw nut in the bore. The chamfered edges of the slots provide a path for V-Wheels and W-Wheels allowing the goRAIL to act as a linear motion guide. Use the T-slots down the sides of the goRAIL or the threaded holes on the ends to attach other goBILDA components.