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Hand-Retractable Plunger
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A new style of a hand-retractable plunger is similar to the standard knurled head hand retractable in function, with one difference. The handle end of the plunger is threaded so you may add a threaded star-type knob, round ball knob, t-handle, soft-grip knob or any other type of handle. This is said to allow the operator to use the type handle they are most comfortable using. They are available in five popular diameters from 10" to 32" through 1/2" to 13" in two spring pressures.