Solid, simple, adjustable mirrors that work and are direct bolt-on for Harley-Davidson's. Mirror heads can be locked in place or adjustable and swivel on a corrosion free stainless steel ball joint that provides super smooth action and longevity. CNC machined from 6061 billet aluminum with a hard black anodize or chrome plated finish. Stems are threaded 5/16"-24 UNF, short are as long as stock Harley mirrors, long are 3" (7.5cm) over stock length. Installation on Indian and most other metric motorcycles require the separate purchase of a mirror adapter.