Our tool organization and storage are made of high quality DIA 1.57" - 2.36" carbon steel, net weight up to 9.37LBS. Each shelf has a load capacity of up to 80-260Lbs, depending on the load bearing wall. Each drill holder has a load capacity of 20Lbs and is spaced 1.65" apart for easy hanging. Sprayed with a layer after electric surge, our tool holder provides more wear resistance.