Open box/ring wrench Proxxon 10 mm PR23910

Proxxon open box/ring wrench 10 mm (model PR23910) is a compact hand tool combining an open-end jaw and a 12-point ring end in a single forged piece. The tool is intended for tightening and loosening hex fasteners with a 10 mm head where access is limited; the open jaw permits quick positioning while the ring end provides a secure grip and even torque distribution for stubborn nuts and bolts.

Advantages

The wrench offers dual-purpose functionality in one tool, reducing the need to switch between separate wrenches during repair and maintenance tasks. Its ring end secures the fastener on multiple contact points to minimise slipping and rounding, while the open end allows access to fasteners in narrow spaces. Forged construction and precise machining ensure consistent dimensions and reliable fit on 10 mm hex heads.

Suitable for

• Automotive repair and maintenance
• Mechanical assembly and disassembly
• Home workshop and DIY projects
• Industrial maintenance tasks in confined spaces

Key specifications

• Size: 10 mm working width for hex fasteners
• Design: combination of open-end jaw and 12-point ring (box) end
• Material: forged steel construction with machined contact surfaces
• Finish: corrosion-resistant surface treatment
• Length: compact profile for access in tight areas

How to use

Select the wrench by the 10 mm marking and position the open end over the fastener for quick fit or engage the ring end for a stable grip. Apply steady turning force in the required direction, taking care to keep the wrench perpendicular to the fastener to avoid slippage. For removal of seized or corroded fasteners, use the ring end to distribute torque evenly; if extra leverage is required, apply controlled force rather than sudden impact.

Usage recommendations

Keep the tool clean and periodically inspect contact faces for wear. Use appropriate personal protective equipment when working on vehicles or machinery. Store the wrench in a dry place and avoid using the tool as a hammer, pry bar, or on fasteners with damaged heads to preserve fit and safety.