Automatic Drain Technology Total Metal Innovations Patent Pending Automatic Drain Technology Total Metal Innovations patent pending Automatic Crain Technology, is the industries first and only system to allow the wheels to drain the standing water trapped behind the beadlock rings. Our Automatic Drain Technology is standard on all TMI weld on beadlock kits. No additional steps are required when installing, when installed with a SAE sized washer the bolt hole extensions will be slightly exposed allowing water to exit.