United's interlocking ESD floor tile mats WORK for a living! ElectraTough Mission Critical provides ultimate protection useful for full surface esd floors OR as ESD flooring Runners. Whether electronic assembly, munitions, computer forensics or other Mission Critical applications, serious protection requires serious control of electrostatic potential. ESD "events" (and their consequences) are caused by the equalization or abrupt grounding of minute but powerful electrostatic charges. When your applications are for "Mission Critical" ESD Protection that conforms to the latest recommendations of EOS /ESD 2020-2007 as well as the most stringent MIL Specs, ElectraTough Modular ESD flooring is the answer. Our unique interlocking flooring system is incredibly resilient. It handles the heaviest of rolling loads yet offers the flexibility for configuration to ANY size shape or plans for future expansion. Featuring Lifetime permanent conductivity that fall in the highly desirable static CONDUCTIVE range THIS material offers ultimate protection for even the most esd sensitive of components and products. Chair casters? Rolling equipment carts? NO PROBLEM! Moving to a new location? Take your floor with you! Your last floor failed due to concrete vapor emissions? Never happen with ElectraTough!