General description Flat pattern spanners with a striking end, designed for heavy-duty applications. Forged from high-quality carbon steel, these tools are hardened and tempered for durability and feature a black phosphate finish for corrosion resistance. Technical specifications Size: 41mm Length: approximately 5mm variation Compatibility and accessories Designed to fit 41mm fasteners and bolts. Sold individually (loose). Installation No installation required; ready to use out of the box. Usage Ideal for loosening or tightening large nuts and bolts. Suitable for professional and DIY tasks requiring high torque.