The Wera 6004 Joker Self-Setting Adjustable Spanner Set is a professional 4-piece tool kit designed to replace multiple fixed spanners across both metric and imperial applications. This innovative set automatically adjusts to different hexagon bolt and screw sizes, making it an ideal solution for plumbers, mechanics, and engineers who need versatile tools that work in confined spaces. Each spanner features continuous parallel jaws that grip automatically when attached to hexagon fasteners. The integrated lever mechanism securely clamps the workpiece, significantly reducing the risk of slippage or damage to bolt heads. The mechanical ratchet function allows fast, consistent work without removing the tool from the fastener, whilst the corner-width rectangular prisms enable a tight 30° return angleperfect for restricted access situations. The single-arm design combines with the ratchet feature to provide excellent manoeuvrability in tight spaces. Together, the four spanners cover all m