• The trolley lever arm is one of the soul attachments of the combined power rack, and we’ve gone through incredibly long practice and research into this product. During this period, a number of patents have been accumulated. Comprehensive weight reduction,improved precision, smoother use of spring pin and brake structure, etc. We have focused on upgrading the handles, aluminum alloy handles, precision hanging rods, combined with “Steplock ™ ” technology, to make disassembly and assembly faster and easier.