45 degree Mid depth blade runs 2 feet to 4 feet. The patented two-part body emits low-frequency sound vibrations that attract fish and trigger strikes while virtually eliminating line twist. Calf tail mixed with shiny colored fibers hackle adds to the attraction. Patented 2 part body made of machined brass. Silver or copper plated. Painted, printed and UV Bright finishes. Body emits sonic vibration when rubbing against free turning gear. Brass stamped blades. Stainless steel shaft. VMC Hook is extremely sharp for quick penetration and perfectly tempered for strength. Calf tail and fiber hackle. Sizes 3-6 include proper size siwash.