Double open-end wrench Proline 9018521 10x11 mm CrV

Proline 9018521 is a double open-end wrench with 10 x 11 mm heads made from chrome‑vanadium (CrV) steel. The cold‑forged, chrome‑plated construction provides corrosion protection and durability while the compact two-size design enables quick switching between 10 mm and 11 mm fasteners and saves space in the toolbox. Suitable for mechanical, automotive and household tasks requiring these sizes.

Advantages

The wrench is manufactured from chrome‑vanadium steel and cold forged for strength and wear resistance. Chrome plating reduces corrosion and simplifies cleaning. The double open-end design offers two commonly used metric sizes in one tool, enabling fast changes between nuts and bolts without swapping tools.

Suitable for

• Turning 10 mm and 11 mm nuts and bolts
• Automotive maintenance and repairs
• Mechanical assembly and service work
• General household repairs and DIY tasks

Key specifications

• Brand: Proline
• Model / MPN: 9018521
• Sizes: 10 x 11 mm
• Material: Chrome‑vanadium (CrV) steel
• Manufacturing: Cold forged
• Finish: Chrome plated
• Standards: DIN 3110
• EAN: 4750959018521

How to use

Place the appropriate open end of the wrench over the nut or bolt head so the flats engage fully. Apply steady force in the required direction to tighten or loosen the fastener. Use the 10 mm end for 10 mm fasteners and the 11 mm end for 11 mm fasteners; avoid using the tool on rounded or damaged fasteners to prevent slippage and wear. Inspect the wrench regularly for corrosion or damage and replace if deformed.

Usage recommendations

For safe and accurate work, use the correct end for the matching fastener size, keep the wrench clean and dry after use, and store it in a toolbox or on a rack to avoid corrosion. Do not use the wrench as a hammer or extend the handle with a cheater bar.