Slimline combination spanner 5.5 mm Proxxon PR23905 – slim flat ring-and-open wrench

Proxxon Slimline combination spanner 5.5 mm is a slim, flat ring-and-open wrench engineered for working with small nuts and bolts in confined or hard-to-reach areas. The low-profile head and combination design provide the ability to switch between an open-end and a ring end quickly, allowing safe and steady torque application on delicate assemblies. This tool is intended for precision work where space is limited and standard wrenches are too bulky.

Advantages

The slim, flat profile reduces interference when accessing tight fasteners and improves visibility of the working point. The combination of open and ring ends offers flexibility: the open end is convenient for quick placement on a fastener while the ring end secures the nut or bolt for reliable torque transfer. Constructed to meet workshop demands, the spanner provides consistent fit and repeatable performance on metric fasteners of the specified size.

Suitable for

• Precision assemblies and small mechanical repairs
• Electronics and electrical enclosures
• Model building and hobby work
• Tight or recessed fasteners in machinery and equipment

Key specifications

• Size: 5.5 mm working width for nuts and bolts
• Design: combination spanner with open and ring ends
• Profile: slim, flat head for confined spaces
• Material: hardened tool steel suitable for hand torque
• Finish: corrosion-resistant surface treatment for durability

How to use

Select the 5.5 mm spanner when the fastener matches the size. Use the open end for quick engagement and initial positioning, then switch to the ring end for full tightening or loosening to reduce the risk of rounding the fastener. Apply steady, controlled hand torque and avoid using the tool with extenders or cheaters that could exceed the intended load. Inspect the spanner before use to ensure no damage or excessive wear that could affect fit.

Usage recommendations

Store the spanner in a tool roll or holder to protect the slim profile and maintain accurate fit. For precision assemblies, work with clean fasteners and apply appropriate torque settings where required to avoid overtightening.