The Wera 454 HF in 3/8" x 150mm is the largest in this imperial range, built for heavy-duty fasteners that demand maximum torque output. It is an excellent choice for structural engineering, plant maintenance, and automotive applications involving large hex socket cap screws. The T-handle's palm-filling ergonomic shape, combined with the 2-component grip's softly rounded recessed finger channels, ensures a powerful and comfortable hold even when applying the highest levels of torque. The additional short arm further leverages the long arm for those particularly stubborn fasteners. The Hex-Plus profile ensures a precise, accurate fit within the screw recess, protecting both tool and fastener. The holding function (HF) keeps the screw securely on the long arm, and the special surface treatment delivers lasting corrosion protection. Features and Benefits:T-handle design for high tightening and loosening torque transmissionErgonomic 2-component handle with finger recesses for comfort