MacPherson Strut Spring Compressor The new MacPherson Strut Spring compressor No. 1117J from Baum features reinforced mounts for compression jaws. The kit compresses all types of MacPherson style coil springs front and rear. Included are three sets of jaws (two each) for 110mm (4.33inch), 120mm(4.72inch) and 130mm(5.22 inch) springs found in most BMW, Volkswagen, Audi, Porsche, Volvo, Saab, Toyota, Lexus, Infinity, Honda, Acura, Chrysler, Scion, Jeep, Ford and GM models. Not for impact use.