Open-end wrench Stanley FMMT13071-0, 20x22 mm, chromium-vanadium steel, 240 mm length

Open-end wrench Stanley FMMT13071-0 is a single-piece hand tool forged from chromium-vanadium steel and finished with a corrosion-resistant satin chrome surface. Designed for hex fasteners in 20×22 mm sizes, the wrench has an overall length of 240 mm and weighs approximately 218 g. Standard open jaws with a 15-degree offset provide improved access in confined spaces, and the tool's anti-slip profile helps maintain grip during mechanical, plumbing and general maintenance tasks.

Advantages

The chromium-vanadium construction delivers a balance of strength and toughness while the satin chrome finish resists corrosion and simplifies cleaning. The anti-slip profile and single-piece forging reduce the risk of deformation under load. A 15-degree offset on the open ends improves clearance for hands and surrounding components, increasing usability in tight or obstructed work areas.

Suitable for

• Automotive and mechanical repair where 20 mm or 22 mm hex fasteners are used
• Plumbing and pipe fitting jobs requiring access in restricted spaces
• General maintenance and assembly tasks in workshops, facilities, and construction sites

Key specifications

• Wrench type: open-end (double-ended, two sizes)
• Sizes: 20 mm and 22 mm
• Material: chromium‑vanadium steel
• Finish: satin chrome, corrosion-resistant
• Overall length: 240 mm
• Weight: approx. 218 g
• Offset angle: 15 degrees on open ends
• Design: single-piece forging with anti-slip profile

How to use

Select the correct jaw size (20 mm or 22 mm) for the hex fastener and place the open end fully over the nut or bolt head. Position the wrench so the 15-degree offset provides the necessary clearance from adjacent parts, then apply steady force in the required direction to tighten or loosen the fastener. For best results, ensure the wrench seats squarely on the fastener flats to minimize slippage and avoid applying sudden torsional shocks.

Usage recommendations

Inspect the wrench before use for cracks or excessive wear and avoid using the tool on rounded or damaged fasteners. Use the appropriate size to prevent rounding of bolt heads, and store the wrench dry to preserve the satin chrome finish. Do not use the wrench with extensions or as a hammer; if greater torque is required, use a correctly rated tool.