Wychwood Slug Weight, The Wychwood Slug Bobbin comprises a revolutionary design that increases bite sensitivity and is fully adaptable to fish both slack and tight lines. Adjustable weights, chains and dacron are available separately so you can adapt your bobbin to suit any situation. The innovative Bite Rotation System allows the slug to adapt to the line tension, which encourages the bobbin to indicate the slightest of line movements, making Wychwood Slug extremely versatile and the only bobbin you will ever need.