This 11/16" Whitworth bi-hexagon socket addresses the largest standard fasteners commonly encountered in classic British engineering. The 11/16" dimension is typically found on heavy commercial vehicles, industrial machinery main assemblies, and substantial structural connections, making it essential for workshops specialising in comprehensive heritage equipment restoration and maintenance. Manufactured from high-quality chrome vanadium steel with professional heat treatment specifications, this socket provides exceptional strength for high-torque applications on large fasteners. The precision hardening and tempering processes ensure long-term durability and resistance to deformation under extreme loads, whilst the chrome plated finish delivers excellent corrosion protection throughout years of professional service. This combination guarantees reliable performance in the most demanding workshop environments. The bi-hexagon internal configuration creates twelve engagement points, distributing stress evenly and protecting irreplaceable period fasteners from damage during heavy torque applications. The precision-chamfered entry enables swift, positive location, improving productivity when working through complex mechanical assemblies. The integrated spring-loaded ball retention system maintains secure attachment to drive accessories during demanding operations. Features and Benefits: • 1/2" square drive for professional heavy-duty applications • 11/16" Whitworth size for substantial classic fasteners • Chrome vanadium steel hardened, tempered and chrome plated for corrosion protection • Bi-hexagon design for superior fastener protection Contents: • 1 x Elora Whitworth Bi-Hexagon Socket, 1/2" Sq. Dr., 11/16"