Wrench Topex Single-end open-end 55 x 440 mm

Single-end open-end wrench Topex Single-end open-end 55 x 440 mm is a hand tool designed for turning hexagonal nuts and bolts of the matching 55 mm size. The tool combines a large 55 mm jaw opening with a 440 mm overall length to provide mechanical leverage for manual torque application while maintaining access in relatively tight or constrained positions where box or socket wrenches may not fit.

Advantages

The open-end design provides quick placement on fasteners and allows working from the side where full enclosure is not possible. The extended 440 mm handle increases leverage for loosening or tightening large fasteners with lower force input. Constructed as a single solid piece, the wrench reduces flex and improves torque transfer. The geometry is suitable for reversing on successive faces of the hexagon to progress in limited-clearance situations.

Suitable for

• Mechanical assembly and disassembly of large hexagonal nuts and bolts
• Maintenance and repair work in construction and industrial settings
• On-site field service where socket sets cannot reach
• Applications requiring manual torque with improved leverage

Key specifications

• Jaw width: 55 mm
• Overall length: 440 mm
• End type: single open-end (one-sided)
• Material: forged steel construction typical for hand wrenches
• Finish: corrosion-resistant treated surface for workshop use

How to use

Select the wrench so the 55 mm opening fits snugly on the nut or bolt head. Position the open end fully onto the fastener with the flats aligned to minimize slipping. Apply steady, controlled force to the handle; use the extended length to increase leverage for loosening tight fasteners. When working in restricted spaces, rotate the fastener by repositioning the wrench on successive flats as clearance allows. Avoid sudden impacts or using the wrench with cheater bars beyond intended manual torque limits to prevent tool damage.

Usage recommendations

Inspect the wrench before use for signs of wear or deformation. Use appropriate personal protective equipment and ensure the fastener is supported to prevent sudden movement. For tasks requiring precise torque values, consider a torque wrench for final tightening after using this open-end wrench to position or initially tighten the fastener.