Combination Wrench KS Tools 503.42055 5 mm Chromium-Vanadium Steel

The KS Tools 503.42055 combination wrench 5 mm is manufactured from chromium-vanadium steel and conforms to DIN 3113 and ISO 3318 standards. With an overall length of 127.5 mm and a lightweight construction of approximately 20 g, this single-piece combination wrench combines an open-end and a box-end in one compact tool. The geometry and material selection provide consistent fit to fasteners and long-term resistance to wear in routine mechanical tasks.

Advantages

This 5 mm combination wrench offers a precise mating to metric fasteners thanks to accurate machining and standardized dimensions. Chromium-vanadium steel delivers a balance of strength and toughness while maintaining resistance to deformation under torque. The single-piece design reduces the risk of joint failure and the compact length improves access in confined spaces. The lightweight construction supports extended use with reduced hand fatigue.

Suitable for

• Assembly and disassembly of small metric fasteners
• Maintenance work on bicycles, motorcycles and light machinery
• Electrical and electronic enclosures where space is limited
• DIY projects and workshop tasks requiring a 5 mm wrench

Key specifications

• Material: chromium-vanadium steel
• Size: 5 mm across flats
• Length: 127.5 mm
• Weight: approx. 20 g
• Standards: manufactured to DIN 3113 and ISO 3318 dimensional standards
• Type: combination wrench (open-end and box-end)

How to use

Select the 5 mm opening to match the fastener head, position the open-end or the box-end depending on access and torque requirements, and apply steady force while keeping the wrench axis aligned with the fastener. Use the box-end for higher torque and the open-end for quick engagement or when rotation range is limited. Avoid using extensions or excessive impact force; the tool is intended for manual tightening and loosening of fasteners sized to fit the 5 mm profile.

Recommendations

Keep the wrench clean and free from oil or debris to maintain grip and prevent slippage. Inspect the contact surfaces periodically for rounding or wear; replace the tool if significant deformation appears. For corrosion protection, store the wrench in a dry place and consider a light oil film if used in harsh environments.