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 09940-14970.Motion ProFeatures: Dual-end socket for versatility Large end dimensions: 50mm OD x 36.6mm ID x 5.6mm pin width (4 pins) Small end dimensions: 33.8mm OD x 25.6mm ID x 3.5mm 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: Large end: 50mm outer diameter, 36.6mm inner diameter, 5.6mm pin width Small end: 33.8mm outer diameter, 25.6mm inner diameter, 3.5mm pin width Drive size: 1/2 inch Cross-Reference OEM Part Numbers: Suzuki tool 09940-14970 08-0567