The Bare Knuckle Pickups Old Guard Neck Humbucker is hand wound in the UK, features Alnico II magnets and is mainly aimed at classic blues, rock, country, pop and alternative tones. From their Boot Camp range, the Old Guard pickups are in the low output range and produce an open, dynamic tone. The Bare Knuckle Boot Camp is a stripped back, no-nonsense pickup range aimed at guitar players who just want to cut to the chase and have great tone. The 50 mm pole spacing is the standard for neck humbuckers (including most guitars with tremolos), a larger pole spacing is only needed on guitars with wide nuts (and a tremolo).