Like its big brother the George Lynch Screamin' Demon™ humbucker, the Seymour Duncan SLSD-1 is a  li'l savage that combines a big, open sound with just a subtle hint of glass in a direct replacement humbucker for Strat® guitars. George asked for a pickup that could scream and provide rich harmonics, but would clean up when he backed it off. Using a unique slotted and Allen head screw combination that gives each coil a slightly different magnetic field, the tone is big and percussive without being too harsh. U.S. Patent No. Des. 355,207.