Features and Benefits: Self-tightening A perfect solution for hard-to-get-to areas Great where large opening is needed Original wedge; cross-hatch tooth design; spring loaded for easy opening Throat clearance of 2-1/4″ high, 1-1/4″ deepMade of heat treated steel. .Specs: Gripping surface: 1-3/4″ wide, 1″ deep Overall length: 9-1/2″ Weight: 8 lbs Capacity: 5 tons