GHS HC-GBM Thick Core Boomers Medium Electric Guitar Strings (11-56) HC-GBM Thick Core Boomers Medium Electric Guitar Strings (11-56) GUITAR BOOMERS 11-56 Thick Core Boomers are for the players that want more from their strings A beefier core boosts your playing inspiration by allowing greater sustain, a more focused low end and thicker tone The thicker core of these Boomers is great for both standard and drop tuning