Designed to fit 1" handlebars with an internal diameter of 21

- Excellent resistance to high and low temperatures: It keeps stable rubber elasticity in a wide temperature range from -40C to 150C

just install the steel plate bracket off your axle then attach the aluminum license plate bracket

Chrome plated nuts

compatible with Harley-Davidson Evolution Sportster (XL) and Big Twin motors

#2003-6 Tool Box Mounting Kit 1958-Early 1962 Harley-Davidson Big Twin - CAD Plated Shape_Round Designed to fit 1" handlebarsAll necessary CAD plated reproduction hardware to mount tool box on all 1958 Early 1962 Harley Davidson Big Twins. Made in Ohio, USA.