Hart Dynamics Hartware is the most heavy duty hardware available. Cast hardened aluminum clamps and unique stainless steel rack tubing allows for years of abuse without failure. The Stainless tubing won't crack, chip, rust or peel, so it stays as shiny as new, even after years of use. The polished, lightly brushed finish is far superior to even the best chrome tubing because the clamps do not slip and require no special memory locks, even with an...