The exact maximum jaw opening depends on the specific variant. As a general reference, a 12" (300mm) adjustable spanner typically opens to approximately 35–40mm (1.4–1.6 in). Please check the variant details or contact us to confirm the jaw capacity for your specific fastener size.

Yes. Chrome vanadium (Cr-V) steel is a standard alloy used in professional-grade hand tools. It offers a good balance of tensile strength and toughness, making it suitable for automotive maintenance tasks such as adjusting brake components, battery terminals, and suspension hardware — as long as the fastener size falls within the jaw's capacity.

The chrome plating provides a layer of corrosion resistance that helps protect the tool from moisture and light exposure. For extended outdoor or marine use, wiping the tool dry after use and applying a light coat of tool oil will significantly extend its service life.

Yes. Because the jaw is continuously adjustable rather than fixed to a specific size, this spanner works with both metric (mm) and imperial (inch) fasteners. Simply turn the adjustment wheel until the jaw fits snugly around the nut or bolt head before applying torque.

If you need a single wrench for occasional home repairs or to fill a gap in your toolbox, the 1 Pcs option is the straightforward choice. If you're outfitting a workshop, a job site crew, or want a spare on hand, selecting a higher quantity typically offers better value per unit. Check the available QTY options above for current pricing.

Yes, adjustable spanners are commonly used for plumbing tasks involving hex-profile fittings, compression nuts, and supply line connections. The 12" length provides enough leverage to loosen or tighten fittings that have been in place for a long time. For round pipe (requiring a pipe wrench grip), a dedicated pipe wrench is recommended instead.

After use, wipe the tool clean with a dry cloth to remove grease, grime, or moisture. Periodically apply a small amount of light machine oil to the worm-gear adjustment mechanism to keep it moving smoothly. Store in a dry location — a tool roll or drawer is ideal — to prevent surface corrosion over time.