Tandemloc ISO 9001:2015 Certified. Certified in the “Design, Development, Manufacture, Inspection, Testing and Distribution of Below-the-Hook Lifting and Rigging Devices; Tie Down Assemblies; ISO HDPEpping ntainer nnectors, ISO HDPEpping ntainer nstruction mponents, and ISO HDPEpping ntainer Mobilizing Equipment” (ISO 9001:2015 Certificate).