A heavy duty, 1/2"D double chain oil filter wrench designed to fit a wide range of filter sizes from 60 to 170mm diameter. The strong, double chain offers excellent grip, even on oily surfaces and is slim enough to fit round filters, pipes and caps located in awkward areas. The 1/2"D wrench head adjuster is driven by a ratchet or power bar, ideal for providing the extra leverage needed to remove stubborn oil filters. Adjustment range: 60 - 170mm.1/2" Drive. For use with 1/2"D ratchet or power bar. Double width chain for strength. For use with 1/2"D ratchet.