This product is an extremely small hexagonal wheel nut with a diameter of 0.8 inch (20 mm) and a diameter of 0.8 inch (20 mm) made by KYO-EI (Kyonaga). Size: Total length 2.0 inches (50 mm), opposite point 0.6 inches (16 mm), weight 1.8 oz (50 g) (1 piece), bag type. Size: Total length 2.0 inches (50 mm), opposite point 0.6 inches (16 mm), Weight: 1.8 oz (50 g) (1 piece); Material: Chromoly wood (SCM435 forged); Effective screw: 1.2 inches (30 mm); Taper Seat: 60 degrees; Adapter: HEX: 19/21 inches (21 mm)