Helix are toothpick-sized, pieces of twisted wire with a triangular cross section, developed at the University of Michigan in 1997 then licensed and commercialized by Polytorx LLC. With its screw-like shape, Helix works by locking into concrete like a corkscrew in a cork and even very low dosages of Helix result in dramatic performance improvements for all uses of concrete. Helix is now used in thousands of applications and sold in 10 countries.