Disengages the line from Jiffy-tite quick connect fittings without removal of the clip. Teeth of the tool fit perfectly into tight tolerance of Jiffy-tite connectors and when rotated allow the line to be pulled without damage to the connector or retaining clip so they can be reused. Tool fit the 3/8 Jiffy-tite fitting found on oil cooler lines used on transmissions and radiators and other applications *4 piece set is the 22990 *made of brass