Proper tire inflation is crucial to vehicle performance and safety. Check tire pressure anywhere in an emergency or on the roadside with this tire gauge keychain. This 3" x 0.4" aluminum tool can quickly calculate PSI levels between 10 and 50 on all kinds of tires. Gauge has a short chain and metal split ring. Choose from blue or black and add your school, sports team, organizational or company logo, emblem or message to create a fun and functional branded promotion for drivers on your customer rolls.