Crescent locking pliers are made to an exacting standard that results in a durable, long-lived tool. They meet stringent ASME B107. 24 and B107. 36 standards as applicable, including proven strength and maximum jaw opening capacity. All Crescent locking pliers have a plastisol grip trigger release for easier opening and large hex key recess when additional leverage is needed for tightening. Head and body also have a narrow profile necessary for work in tight and confined spaces.