BlueSpot Heavy Duty Pin Type Coil Spring Compressor 2 Piece Essential tool for quickly and securely compressing springs on vehicles when repairing or replacing the shocks, springs or struts Manufactured from heat treated carbon steel for increased durability Suitable for use with coil springs with a diameter less than 16mm These coil spring compressors feature a heavy duty hook with an extra safe pin that locks onto the spring to give you an additional level of safety when compressing the spring