A top quality weighted stainless steel bobbin with quick adjusting disc-drag that allows a perfect level of thread tension. The tube has very strong hardened steel on the ends, coated to prevent fraying. Suitable for every size spool. The original model is for general use and nearly all thread types. The saltwater streamer model (blue) has a wider tube and can be used for heavy thread, narrow chenille or yarn. The compact model is best when there is limited room around the fly axis and for close work.