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The Wera Joker 6004 is a four-piece self-setting wrench set that replaces a range of metric and imperial spanner sizes. Its parallel jaws clamp a hex bolt or nut automatically once the tool is seated, and an integrated lever mechanism holds it there to reduce slipping and rounding. A mechanical ratchet needs only a 30-degree back-pivoting angle, and the single-arm design with corner-width prisms lets it work in tight spaces. It suits tradespeople and serious DIYers who want one compact set instead of a drawer of fixed spanners; the trade-off is a bulkier, heavier head than a plain combination wrench.
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Lowest price we've seen: $195.49 on Nov 13 at Bicycle Warehouse. Tracked across 15 stores since Nov 13.
Rated 5 out of 5 from 28 ratings, buyers consistently praise the grip, the self-setting action and the build quality. The main reservations are the size and weight of the heads and the learning curve of seating the jaws correctly.
The Wera 6004 Joker is a set of four self-setting wrenches. Each wrench has continuous, parallel jaws that replace a range of single spanner sizes. When the tool is placed on a hexagon bolt or screw, it sets the size automatically.
An integrated lever mechanism clamps the hexagon screw or bolt between the smooth parallel jaws. The surface pressure is even, which helps prevent the bolt or screw head from rounding off during power transmission.
A mechanical ratchet function in the mouth of the tool lets you turn a fastener quickly without removing the wrench. Corner-width rectangular prisms allow a back-pivoting angle of only 30°. The single-arm design and corner-width prism make it suitable for confined spaces.











