Graph Tech offers two different types of SuperCharger kits for electrics. We have kits for Strat & Tele style guitars as well as guitars with tune-o-matic guitars. For Strat & Tele style guitars, we combine a set of String Saver saddles, a TUSQ XL slotted nut and a set of TUSQ XL string retainers. We have five different kits for the most popular style guitars. For guitars equipped with tune-o-matic style guitars, we offer either a 4mm or 6mm ResoMax NV2 bridge (loaded with String Saver saddles) and a slotted TUSQ XL nut. This particular kit has off-set saddles.