The Seymour Duncan JB Jr. is a twin coil design pickup that gives you the character of their popular JB Model Humbucker in a single coil size. Its adjustable pole pieces more closely emulate the magnetic field of a full size humbucker and allow you to fine tune the balance of your strings: a first for a humbucker this size. You can expect great harmonics and a sweet high-end. Use a complete set of Juniors or pair one in the bridge with a Seymour Duncan Duckbucker in the neck and middle and have the quietest working man's Strat around. U.S. Patent No. Des. 355,207.