Features and Benefits:Dual position jaws give you a larger size range and quick adjustments;Fine adjustment screw for precise loosening and tightening;Locks tight with the squeeze of one hand;Unlocks easily by squeezing release lever;Works with oil filters from 2-1/2 to 5-1/2 inches (63-139mm);Dual position jaws give you a larger size range and quick adjustments. Fine adjustment screw for precise loosening and tightening. Locks tight with the squeeze of one hand. Unlocks easily by squeezing release lever. Works with oil filters from 2-1/2 to 5-1/2 inches (63-139mm)