Open End Wrench HAZET 450N-4X5

The Hazet Open End Wrench 450N-4X5 is a precision hand tool crafted from chromium-vanadium steel. With 4 x 5 mm jaw sizes and a compact overall length of 99.5 mm, the wrench provides a combination of portability and precise fit for small fasteners. Weighing approximately 12 g, it is designed for fine mechanical work where access and control are important. The tool is supplied as a single piece for targeted use in individual repair or assembly tasks.

Advantages

Chromium-vanadium steel construction offers high tensile strength and wear resistance for extended service life. The small 4 x 5 mm open ends are machined to provide accurate engagement with fastener flats, reducing rounding and slippage. The compact, lightweight design improves access in confined spaces and reduces user fatigue during repetitive precision operations.

Suitable for

• Tightening and loosening small nuts and bolts in mechanical assemblies
• Precision work on bicycles, cameras, instruments, and small appliances
• Maintenance and repair tasks in workshops with limited access
• Electronics enclosures and delicate mechanical fittings

Key specifications

• Material: Chromium-vanadium steel
• Jaw sizes: 4 mm and 5 mm (open ends)
• Overall length: 99.5 mm
• Weight: approx. 12 g
• Finish: corrosion-resistant surface treatment

How to use

Select the appropriate open end (4 mm or 5 mm) to match the fastener flats. Position the wrench fully onto the nut or bolt to ensure maximum contact, then apply steady torque in the required direction. For confined spaces, use the shorter reach of the wrench to manipulate fasteners carefully and avoid excessive force that could damage the tool or the fastener. After use, wipe clean and store in a dry tool kit to maintain condition.

Usage recommendations

Use the wrench for manual tightening and loosening tasks only; do not apply impact loads or use as a hammer. For better long-term performance, periodically inspect jaws for wear and avoid exposure to corrosive environments. When working on precision equipment, use torque control practices appropriate for the application.