Kleinn Air Horns All-Metal Push Button Terminator is a perfect, discreet and nearly bulletproof trigger for any Kleinn Air Horn. This masterfully constructed All Metal Push Button Switch dubbed, The Terminator features an easy to hide visible button measuring a mere 3/4-Inches in Diameter. The Kleinn Air Horns All-Metal Push Button Terminator is designed with an Ultra-flush mount requiring a miniscule 2-Millimeter Minimum Mounting Thickness, and Dual Post Screw Terminals.