Stonfo Elite 2 Saltwater Streamer Disc Drag Bobbin has a larger diameter and beefier tube than the standard version with a disc drag. Smoother than smooth. The hardened steel tip insert and countersunk feed on this machined bobbin allows thread to glide through the tube for threading and tying. The drag control has a large adjustment zone for fine tuning thread tension to your personal liking and dependent on the strength of the thread. Some deer hair gurus are using these as their choice bobbin.