User Friendly: Operating Dry-Mate is simple. The handles interlock making it easy to identity which handle opens or closes first. No guessing involved! The two Dry-Mate halves couple together with cam levers for positive engagement. Design: The Banjo Dry-Mate is designed for safe and easy spill free connections. The “double ball” design allows maximum flow, while the cam lever style of connection is the most recognized fluid connector. Prevents Accidental Spills and Exposure Double Ball Design with Cam Lever Connection.