Valve Core Remover: It Installs And Removes TR C1 Schrader Tubeless Tire Valve Cores, Tread Depth Gauge: It Easily Shows Tire Tread Status With Both SAE And Metric, Pencil Air Gauge: It Helps Determine Exact Tire Pressure With +/-1 PSI Accuracy, Tire Crayon And Pen: It Is Used For Pointing Out Wear Spots And Injuries On Tires And A Standard Ballpoint Pen