Wera 7870 Joker M Self-Setting Insert Spanner Head, 9x12mm Drive, 13-16mm

The Wera 7870 Joker M Self-Setting Insert Spanner Head is a revolutionary tool designed to streamline your work with fasteners. This innovative insert head features Wera's unique Joker parallel jaw technology, which automatically adjusts to grip any fastener within its specified 13–16 mm range. This self-setting action eliminates the need to manually adjust the tool or search for the correct fixed size, saving you significant time and effort on the job.

Engineered for compatibility with standard torque wrenches and ratchets featuring a 9×12 mm square drive, this spanner head transforms your existing tools into versatile, multi-size solutions. Its compact design incorporates a 30° return angle, making it perfectly suited for working in tight, confined spaces where a full swing of a traditional spanner is impossible. This feature significantly increases accessibility and reduces user fatigue.

By covering four common metric sizes (13, 14, 15, and 16 mm) with a single head, the Wera Joker M effectively replaces the need for multiple individual spanners. This not only reduces the number of tools you need to carry but also minimises clutter in your toolbox or worksite. It's an ideal solution for professionals and serious DIY enthusiasts who require efficiency and reliability.

Crafted to Wera's renowned high-quality standards, this insert spanner head is built for durability and precise performance. The self-gripping jaws provide a secure hold on fasteners, reducing the risk of slipping and damaging bolt heads. Whether you're performing mechanical repairs, assembly tasks, or maintenance work, this tool enhances productivity and ensures a professional result every time.