The only two-wire, pre-assembled starting components Hard Start Kit on the market that uses a high-quality Mechanical Potential Relay in a unique design! Absolutely no use of circuit boards, timers or PTCR devices.! 3.5-5.0 ton maximum torque Hard Start Device for single phase 208V, 230V and 265V A/C, refrigeration and heat pump compressors. The design sets Kickstart apart from the competition. Ongoing research and development continues to earn product approval from leading compressor and equipment manufacturers. A first for any two-wire starting device in the HVACR industry. Hard start devices extend the life of compressors considerably by bringing them up to full speed more quickly and efficiently. They also assist compressors in starting under very adverse ambient conditions such as low voltage or high head pressures.