The Seymour Duncan TS-1 makes wiring mods easy with four different sounds at tips of your fingers. This is the flat model, designed for most guitars with flat tops. See the specs below for dimensions.
The Seymour Duncan TS-1 allows you to expand your tonal palette by accessing three unique tones from a humbucker, thanks to the TS-1 mounting ring that holds two small switches. For use with nearly any humbucker and Trembucker pickups with four-conductor cable, Seymour Duncan or otherwise. It is the perfect match for the P-Rails.
This "stealth" pickup switching device allows you to access series, parallel and split wirings with a standard humbucker. And it's easy to install. Just solder your pickup leads to a small color-coded circuit board. That's it. Push the two switches towards each other for standard series wiring; away from each other for parallel wiring; and both towards one coil (either one) to shut that coil off.
Inside: 2.780 x 1.470 inches
Outside: 3.54 x 1.78 inches
Pickup mounting hole spacing: 3.076 inches on center
Trim ring mounting hole spacing: 3.20 x 1.513 inches on center
Height: 0.200 inches (ring), 0.328 inches (switch casing)
Circuit board: 1.353 x 0.402 inches
Note: Will not fit Nickel and Gold covered Trembuckers.