Chain Wrench, 2 1 2 in to 5 in Opening, 20 1 4 in Chain, 18 in OAL no checkout tab lock headband Ratchet headband is strip tab lock headband Ratchet headband is strip proof and provides easy adjustment SwingStrap™ combines the benefits of both the ratchet and the 360° padded sweatband with the added ability to convert from forward to reverse wearing position without having to remove and reinstall the suspension long wear and traction on slick surfaces Steel shank is longer ratchet like action in either direction Heavy duty model has replaceable alloy steel jaws Light duty model has a one piece forged alloy steel handle and jaw Double jaw gives fast