Solid metal construction tire pressure gauges. Feature dual scale measurements (20-120 PSI/150-800 kPa), pocket clip and built-in deflating pin! Among pencil-style tire gauges tested, Superex's TG-series tested highest for accuracy, repeatability, clarity and durability in an updated 2008 study by the AFM Research Center!. Complies with Prop 65. 5 1/2" L x 3/8" Diameter