The Motion Pro Spanner Nut Socket is designed for the removal and installation of spanner (castle) lock nuts, serving as an equivalent to Suzuki tool 09940-14940. Motion Pro Features: Socket dimensions: 43.2mm outer diameter, 33.15mm inner diameter, 5.25mm pin width (4 pins) Constructed from premium high-carbon steel Heat-treated for enhanced strength and durability Durable hot black oxide finish 1/2-inch drive compatibility Laser-etched with Motion Pro logo and part number Specifications: Outer diameter: 43.2mm Inner diameter: 33.15mm Pin width: 5.25mm Number of pins: 4 Drive size: 1/2 inch Cross-Reference OEM Part Numbers: Suzuki tool 09940-14940 08-0575 Majority of our listings are for a direct replacement for your original part. Our parts are made of quality and are designed to meet or exceed the original OEM Standards. Our products are often a cost effective alternative to genuine OEM Parts. Please note: the models of bike we state in our listings are for general guidance only. Please make sure this item will fit your bike before purchasing. Also, we cannot guarantee fitment to any non-UK models.