The Muscle worm was designed by the late Bill Murphy for his method known as stitching. Bill's dedicated efforts with this technique had made him famous as a big Bass Specialist. Made with its bulbous Muscle this worm was designed to have enhanced action by bobbling along through obstructions and debris on the lake bottom. The Muscle will help float the tail section higher and more visibly. This worm has also become useful wacky weighted with a hook through the bulb. More information on Stitching can be found in Bill's book in pursuit of Giant Bass located on this site.