Combination wrench KS Tools 503.4644 — 38 mm, Cr-V steel, 15° offset, 488 mm length

KS Tools 503.4644 is a single-piece combination wrench with a 38 mm opening, manufactured from chromium-vanadium (Cr-V) steel. The tool combines an open-end jaw and a box end on the same body, offering a 15° offset that improves access to fasteners in confined or recessed locations. With a total length of 488 mm and a mass of approximately 1.4 kg, this combination wrench is intended for tasks that require long reach and reliable torque transmission in automotive, industrial and maintenance work.

Advantages

The one-piece Cr-V construction provides enhanced strength and wear resistance compared with lower-grade materials, while the 15° offset helps reduce knuckle contact and permits a better working angle on tight fittings. The dual-end design allows quick switching between open-end and box-end engagement without changing tools, and the extended length increases leverage for loosening or tightening larger fasteners. The hardened and tempered finish improves durability under repeated torque cycles.

Suitable for

• Automotive repair and wheel or suspension work requiring long reach
• Industrial maintenance tasks with recessed or hard-to-reach nuts and bolts
• Heavy equipment assembly, service and general mechanical maintenance

Key specifications

• Wrench type: combination wrench (open-end + box end)
• Opening size: 38 mm
• Material: chromium-vanadium (Cr-V) steel
• Offset angle: 15°
• Total length: 488 mm
• Weight: approximately 1.4 kg
• Finish: hardened and tempered surface for wear resistance

How to use

Select the appropriate end of the combination wrench for the fastener: use the open end for quick engagement where clearance allows, and the box end for a more secure grip on hexagonal heads. Position the wrench so the 15° offset provides the best approach angle to the nut or bolt, and apply controlled force to avoid slipping. For high-torque applications, maintain alignment between wrench and fastener axis to reduce the risk of rounding. After use, clean off debris and store the wrench in a tool tray or rack to prevent corrosion and avoid damage to the edges.

Usage recommendations

Use the wrench within its mechanical limits: avoid striking with a hammer or using cheater bars beyond the intended leverage to prevent material failure. Inspect the contact surfaces before use and replace the tool if the jaw edges are deformed or excessively worn. When working on torque-critical fasteners, use a calibrated torque wrench to verify final torque settings.