The Sealey 1/2" Drive 4 Pin Motorcycle Swingarm Lock Nut Socket with 48.5mm diameter (Model SMC18) is designed for larger castellated locknuts found on heavyweight and touring motorcycles. This generous sizing makes it particularly suitable for models with robust swingarm assemblies where greater fastener dimensions are required. The 4-tooth socket design ensures positive engagement with castellated locknuts, preventing slippage and reducing the risk of damage to both the fastener and surrounding components. The 1/2" square drive provides excellent torque transfer, essential when dealing with tight or corroded swingarm nuts. Its professional construction delivers the strength and precision needed for regular workshop use. Beyond swingarm applications, this 48.5mm socket proves invaluable for accessing certain engine mounting nuts where castellated fasteners are employed. The tool's specialist design eliminates the frustration of using makeshift solutions, ensuring efficient and safe removal every time. Features and Benefits: • 48.5mm diameter for larger motorcycle castellated locknuts • 4-tooth design for secure fastener engagement • 1/2" square drive for compatibility with standard tools • Ideal for heavyweight and touring motorcycle swingarms • Suitable for engine mounting nut applications • Professional-grade construction for durability Specifications: Brand: Sealey Nett Weight: 0.280kg External Ø: 48.5mm Internal Ø: 41mm Internal Socket Depth: 48.5mm Number of Pins: 4 Pin Width: 5.5mm Pin Depth: 4mm Drive Type: 1/2"Sq