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