Accu-Gage S60XA (5-60 PSI) Swivel Angle Chuck Dial Tire Pressure Gauge with Bleed Valve Gauge has a full geared, precision movement with bronze bourdon tube; unlike piston-plunger-type gauges, the bourdon tube movement is not affected by changes in temperature, humidity or altitude Swivel angle chuck makes it easier to reach tire valves Durable steel case with polished brass bezel, stem, pressure release valve assembly and a 2 inch dial 5-60 PSI steel case gauge (recommended for tire pressures 15-45 PSI) Needle holds pressure reading until released and a pushbutton valve bleeds air to desired tire pressure