Forged steel construction with narrow profile head reaches into tight spacesTight tolerance on thumbscrew will not loosen or wobble with useExtra wide jaw capacity with standard and metric markingsThe IDEAL Made in the U.S.A. tool line uses forged-steel construction, which provides extra strength and hardness without sacrificing flexibility. It is manufactured and assembled with a tight tolerance on the thumbscrew to prevent it from loosening or wobbling with use. It features a narrow profile to fit into tight spaces and an extra wide jaw capacity with laser-etched standard and metric markings that wont rub off from use.