Handy spring-action of the stainless steel tool keeps the tool on the line and makes the tool easier to use. 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. Tools fit the most popular Jiffy-tite fittings found on oil cooler lines used on transmissions and radiators and on other applications. Applications: 1996 and newer GM vehicles; Many 2004 and newer Daimler Chrysler vehicles; Some 2005 and newer Mercedes vehicles; Harley-Davidson V-Rod; Freightliner; Peterbilt; Volvo; White.