The Magnum Pro MPPKT MP-P Pressure Calibration Pump Kit, 100 psi, with Analog Gauge, Hose, and Case features a Delrin® plastic handle that prevents body heat transfer from interfering with readings, as well as an oversized check valve for smooth operation. The dual a-rings on all pistons ensure zero leakage. It uses a "Schrader" valve which reduces the potential for failure caused by the vent valve failing. The unique hose and fittings are push-on, and a swivel keeps the hose from tangling. If the hose is damaged simply cut off the end and reinsert it into the fitting. A special non-dispersing lubricant makes the first stroke as easy as the others, and eliminates wear caused by the grease migrating to the ends of the stroke.