Knurled tip provides positive grip. Ten packs are available. Safety Blow Gun-1/4” NPTF Inlet and 1/8” Outlet. These safety blow guns have safety tips which prevent buildup of tip pressure in the event the outlet is obstructed or “dead ended”. In compliance with OSHA 1910.24b and 1910.95 requirements when used on an air line of 150 PSI or less. Use personal protective equipment, safety goggles, chip guarding barrier screens and ear protection.