Anti-Static Anhormats protect valuable flooring and carpets up to 5/8" thick from wear and tear. Trans-Stat mats dissipate static electricity without ground cords. Hundreds of anchorpoints secure mat to carpet. Beveled edge for safety. Trans-Stat meets government standards for electrostatic properties of materials in accordance with Federal Test Method Standards. Ultra-clear vinyl. Lifetime guarantee (guarantee void if metal casters are used.)