The Knuckle 60 from Megabass may be the ultimate adjustable crankbait. Built for increased effectiveness across a wide range of applications, the Knuckle 60 uses Megabass' unique FX System. This system utilizes a transformable square bill lip that can be adjusted to target depths of 0-1', or 4-5', depending upon conditions. This bill is anchored by the "knuckle" mechanism that engages with a click, locking the bill in position. The rugged lip produces a fluttering motion when it comes into contact with underwater structure. It will reliably produce alluring vibrations and movement, regardless of the speed with which it's retrieved. Unlike other shallow water crankbaits, which primarily target stationary fish, Knuckle 60 is effective as a mid-range crank as well.