The Wera 7870 Joker S is the small-size variant of the self-setting insert spanner, designed to cover wrench sizes from 10 to 13 mm — ideal for the smaller fasteners commonly encountered in precision and general assembly work. It fits directly into Wera Click-Torque X and XP series torque wrenches via its 9x12 mm square head mounting. The self-adjusting jaws eliminate the need to carry multiple fixed spanners, automatically setting themselves to the correct size as soon as the tool is placed on a hexagon bolt or screw head. The integrated lever mechanism locks the fastener firmly between the jaws, while the built-in mechanical ratchet allows rapid, consistent tightening without removing the tool. The 30° return angle makes it well suited to tight access areas. Features and Benefits: • Self-setting jaws adjust automatically to fastener size — no manual adjustment needed • Replaces multiple individual spanners within the size range • Lever mechanism clamps securely to reduce slippage and fastener damage • Mechanical ratchet for fast, continuous screwdriving • 30° return angle for use in confined or restricted spaces • Laser-engraved, abrasion-proof QR code for torque value reference Contents: 7870 Joker S Self-setting insert spanner for wrench sizes 10–13 mm, 9x12 mm, 9x12 x 10-13 x 7/16–1/2" x 57.7 mm Specifications: • Configuration: S

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