Disclaimer: Not recommended for use with high vibration tools (impact wrenches, orbital sanders, etc.). Also, use of these couplers with a leader hose will extend the lifespan of the product further Ideal for Comfort: Remove debris, dry off fluids, blow out airlines, clean up projects, and use in tight spaces without leaks while taking it easy on yourself Rubber Tip Nozzle: Leak-free and mar-resistant application rubber tip to avoid knicks/scratches on paint or other fine surfaces Heavy Duty Construction: Electroplated die-cast aluminum body for sustained long term use NPT: 1/4" national pipe thread air inlet