Adjustable spanner Wera 6004 Joker M

The Wera 6004 Joker M Adjustable spanner is a self-setting universal screwdriving tool that automatically adapts to a wide range of metric and imperial hexagon bolts and screws. With continuous parallel jaws and an integrated lever mechanism, the tool clamps the fastener securely and reduces the risk of slippage or damage. Its ratchet function allows for fast screwdriving without removing the tool, and the single-arm design makes it suitable for use in confined spaces. The Joker 6004 replaces several fixed spanner sizes and is designed for precision and durability, featuring a maximum jaw width of 1.6 cm and a total length of 188 mm.

Advantages

The self-setting jaws automatically and continuously adjust to the required hexagon size, eliminating the need for multiple individual spanners. The integrated lever mechanism ensures secure clamping of the bolt or screw to minimize slippage and damage. The ratchet feature permits rapid and consistent turning with a return angle of only 30° when using the corner-width rectangular prism, enabling work in tight spaces. Metallic finish provides wear resistance and long service life.

Suitable for

• Adjusting and tightening metric and imperial hex bolts and screws
• Use in limited-access or confined workspaces
• Professional mechanical work and DIY maintenance
• Applications where a single, versatile spanner is preferred over multiple fixed sizes

Key specifications

• Brand: Wera
• Model: 6004 Joker M
• MPN: 05020103001
• EAN: 4013288216908
• Maximum jaw width: 1.6 cm
• Length: 188 mm
• Finish: metallic

How to use

Place the Joker 6004 over the hexagon bolt or screw so the continuous jaws encompass the fastener. The jaws will automatically set to the required size; engage the integrated lever mechanism to clamp the fastener firmly between the jaws. Use the ratchet function to turn the fastener without removing the tool, applying steady force and using the short return angle to work where clearance is limited. Release the lever to remove the tool once the operation is complete.

Usage recommendations

For best results, ensure the jaw faces and the fastener are clean and free from heavy corrosion or burrs. Do not use the Joker 6004 as a hammer or pry bar. When working at high torque, verify that the fastener and tool condition are suitable to avoid rounding of edges; select a different tool if needed for very high torque applications.