Wera Kraftform Plus 354 Hex-Plus 4mm Hexagon Screwdriver is designed for the Professional user. Wera Hex-Plus technology prevents rounding of screw recess and transfers up to 20% more torque. All Wera hand tools feature the trademarked ergonomic Kraftform handle, with hard and soft zones, that fits the shape to the hand for the ultimate in comfort and high-speed torque transfer. Handle marking on top of handle includes screw symbol and size of tip to easily find the right screwdriver in your toolbox or workplace. Anti-roll protection at base of handle stops screwdriver from rolling away at workplace. Screwdriver dimensions: Hex 4mm x 3” shaft length, 3-7/8” handle length. Wera – The Best Tools For The Job!