Jaws are made from 4140 chrome molybdenum steel, an alloy that offers an excellent combination of toughness and machinability with a natural resistance to corrosion, Pull-type release lever on each pliers allows you to clamp, release, reposition, and clamp again one-handed with more control than a traditional pinch-style trigger, Generously sized tension adjustment knob offers a large, nonslip knurled surface and a through hole for added leverage with a second tool, Organizer rack keeps pliers upright and organized, making them easy to grab, and saving space in toolbox drawers or tabletop surfaces, 5 Inch Curved Jaw Locking Pliers.