Ihc SK8 8mm RepRap Rod Holder Linear Rail Support Shaft Electronic Components Electronic Hobby Kit

Usable with any 8mm linear guide, you can simply slide the rail through, then tighten the clamp screw at the top to fix it in place. Then use up to 6mm diameter bolts to attach them. If you need to disassemble or otherwise repair your machine, its easy to open up the clamp and remove the rail.