Upgrade your mechanical advantage with the Marksman 12″ (300mm) Adjustable Wrench. This heavy-duty “shifting” spanner is a vital hardware tool for the UK trade, offering the superior leverage required for stubborn, large-diameter fasteners and commercial plumbing installations. Forged from high-grade, heat-treated carbon steel, it features a wide-opening jaw with a precision-machined adjustment gear for a rock-solid grip. The 300mm handle provides the extra torque needed to break seized bolts, while the laser-etched metric scale ensures rapid and accurate sizing. Built for sustainability and rugged performance, this wrench is a cornerstone for any professional workshop or industrial toolkit.
£9.99 Incl. VAT
The Marksman 12″ (300mm) Adjustable Wrench is a specialist hardware tool designed for high-performance maintenance and construction. At ECO Heat Shop, we prioritise tools that enable the sustainable repair of large-scale infrastructure. While smaller spanners may struggle with high-diameter fittings, this 300mm wrench provides the mechanical advantage necessary to loosen rusted commercial heating valves or heavy automotive components with minimal manual effort.
Forged from a single piece of high-carbon steel, the wrench features an ergonomic I-beam handle that resists bending even under significant pressure. The smooth-action worm gear is engineered to hold the jaw position firmly, preventing the “jaw creep” that can often lead to rounded fasteners on lower-quality tools.
| Tool Length | 12 Inches / 300mm |
| Material | Drop-Forged, Heat-Treated Carbon Steel |
| Max Jaw Opening | Approx. 35mm – 40mm |
| Measurement Scale | Metric (Laser-Etched) |
| Application | Commercial Plumbing, HVAC, Plant Maintenance & Automotive |
As a specialist UK-registered hardware provider (Company No: 16383897), we only stock tools that meet the rigorous standards of the British trade. This Marksman 12″ wrench is a staple for its raw power and industrial reliability. We offer fast UK delivery and products that help you manage your home and professional plumbing projects with total confidence.
Expert Tip: Always pull the wrench towards you rather than pushing it away; if the fastener breaks free suddenly, you are less likely to injure your knuckles. For the best grip on seized 32mm or larger fittings, ensure the jaw is tightened fully onto the flats of the nut before applying force. Periodic cleaning and a drop of light oil on the worm gear will keep the adjustment action smooth for years.
ECO Heat Shop: Your trusted UK source for professional adjustable wrenches, high-torque spanners, and sustainable hardware solutions.
| Weight | 0.44 kg |
|---|---|
| Dimensions | 310 × 90 × 25 mm |
ECO Heat Shop Ltd provides national distribution for plumbing and heating supplies across England, Scotland, and Wales. Orders placed before the 18:00 PM (Afternoon) cutoff are typically processed for same-day dispatch.
View Full Shipping & Collection Policy ›Hours: Monday – Saturday: 08:30 AM – 06:30 PM | Sunday: Closed
Location: Unit 8 West Cross Shopping Centre, Oldbury Rd, Smethwick, B66 1JG
In-shop precision key cutting available during standard operational hours. Professional while-you-wait service for Smethwick residents and trade contractors.
Smart supplies for real heat.
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