Mister Big was designed for the high speed trollers. The 16 oz. head is machine drilled with eight vent holes which creates a huge smoke trail. It also has internal chambers with with stainless steel balls that rattle when trolled. Mister Big is precision machined to exacting tolerances and includes Billy’s special 360 degree turbulence ring. Troll between 8 to 20 knots. Wahoo’s worst nightmare!