It was developed for use on motorcycles, such as the Honda CB125R. Unlike other spring compressors, which can scratch paint or leave marks, this tool is engineered cause no damage and be safer! The ultra-thick, recessed upper and lower plates securely cradle the spring, preventing it from slipping. The four stainless steel threaded rods ensure that the spring load is spread evenly for added safety. Place one of the supplied spring washers and one of the standard M10 nuts (not the flanged ones) onto each of the rods and lock them in place using a 16mm spanner. Ensure the shock is securely in place, Only then evenly tighten each of the four flanged nuts with a 15mm spanner, one turn at a time, until the lower/compression plate reaches the required height. Once the required work is complete,.