Female Swivel Air Hose Connector Combines the best features of the ball swivel fittings and connectors, resulting in a secure and ergonomic connection that eliminates the need for a separate swivel fitting Reduces leak points and creates a more lightweight tool-to-hose connection! Swivel ability extends hose life and minimizes user fatigue Connector and nut are nickel-plated hardened steel; threaded fitting is brass Milton interchange, "M" style fitting, 1/4" Connector x 1/4" FPT threads