The Wera 7870 Joker M is the medium-size variant of the self-setting insert spanner, covering wrench sizes from 13 to 16 mm — a versatile mid-range that suits a broad range of general assembly and maintenance fasteners. It connects to Wera Click-Torque X and XP series torque wrenches via its 9x12 mm square head mounting. As with all Joker insert spanners, the continuous, parallel jaws self-set automatically when placed on a hexagon bolt or screw, removing the need for manual adjustment or carrying multiple fixed spanners. The integrated lever mechanism clamps the fastener firmly between the jaws, reducing the risk of rounding or slippage. A mechanical ratchet allows consistent, rapid tightening without repositioning, and the 30° return angle keeps performance high even in awkward spaces. Features and Benefits: • Self-setting jaws adjust automatically on contact with the fastener • Covers a wide mid-range of metric and imperial dimensions with a single tool • Lever mechanism ensures a secure, slip-resistant grip on the fastener • Mechanical ratchet for fast, uninterrupted screwdriving • 30° return angle for use in confined or restricted access areas • Laser-engraved, abrasion-proof QR code for easy torque value reference Contents: 7870 Joker M Self-setting insert spanner for wrench sizes 13–16 mm, 9x12 mm, 9x12 x 13-16 x 5/8–3/4" x 67.7 mm Specifications: • Configuration: M

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