Telestrut tubing is a telescoping square tubing system that allows you to design, build, and change support structures faster and better than you ever thought possible. By joining infinitely adjustable three-sided channel with incrementally adjustable, pre-punched four-sided tubing, the Telestrut and Telespar square metal tubing systems can be telescoped, spliced, adjusted, and reused faster and easier than anything in their class. Telescoping strut is the most versatile multi-purpose support system ever devised.