Wera 7880 Joker 4XL Self-Setting Insert Spanner (41-55 mm / 1-11/16"-2-1/16", 14x18 mm) – 05020178001

Handle large fasteners with one insert spanner instead of carrying several separate sizes. The Wera 7880 Joker 4XL adjusts continuously across hexagonal fasteners from 41 to 55 mm, or 1 11/16 to 2 1/16 inches, for metric and imperial work.

Fit its 14 × 18 mm rectangular insert mount into a compatible torque wrench for heavy-duty installation or maintenance. The 151 mm tool weighs 1,000 g, giving you a substantial insert for demanding jobs.

Parallel, smooth jaws apply force across the fastener’s flat faces rather than its corners, helping prevent rounding and finish damage. An integrated mechanical ratchet keeps tightening or loosening continuous, while the 30° return angle helps when space is tight and repositioning is difficult.

A laser-engraved QR code on the drive end links to torque value calculation through a smartphone app. It adds a practical reference at the tool, so you can check torque values as part of your work routine.

For large fasteners in confined installation areas, the self-setting jaw range and compact return angle make this insert useful in one focused setup. Pair it with a torque wrench that has a matching 14 × 18 mm rectangular receiver.