Compatibility Model: Ultra fits for Xbox Series X & Xbox Series S Controller; Not compatible with other Xbox One Controllers. Check the second picture of the listing before purchase Fit Perfectly: Fit the best by far; Completely fits flush on all side; Sit properly on all the clips Package Includes: 1* Right side rails; 1* left side rails; 1* open shell tool. (Important: The controller and other parts are not included.) Easy to install: No opening shell action is needed to install these panels; Get an installation video guide on Youtube by searching “Extremerate Shell for Xbox Series X/S Controller” Personalized Feature: The matte scarlet red color looks great; Great smooth grip, soft in hand and feels silky; Anti slip, sweat free for a long period game playing