One Set for Every Nut and Bolt—No Adjustments Required.

The Wera 6004 Joker 4 Set 1 is a revolutionary universal fastening solution that automatically finds the right size. This 4-piece set covers at least 18 different metric and imperial dimensions ranging from 7mm to 19mm (1/4" to 3/4"). Its continuous, parallel jaws replace the need for several individual wrenches, making it the perfect companion for field service and maintenance.

Equipped with a mechanical ratchet function, these wrenches allow for fast and consistent work without needing to remove the tool from the fastener. The integrated lever mechanism securely clamps onto the bolt head, while the 30° return angle allows you to navigate even the most confined work spaces with ease.

Key Performance Features:

• Automatic Self-Setting: Continuously and automatically grips hexagonal screws and bolts upon attachment.
• Universal Coverage: Replaces multiple individual spanner sizes across both metric (7-19mm) and imperial (1/4"-3/4") scales.
• Smooth, Parallel Jaws: Prevents rounding and damage to fastener heads by applying surface pressure rather than corner pressure.
• Rapid Ratcheting: Fastening is completed quickly without removing the wrench between turns.
• Ultra-Compact Design: Includes a robust textile folding pouch that is compatible with the Wera 2go system for easy transport.
• Confined Space Expert: The single-arm design and low return angle make it ideal for tight engine bays or industrial machinery.