To use them you have to pry off the back of the handles (the blue tool is useless for this), then unscrew the 5 screws on the back (2 in each handle and one hidden screw under the notice sticker in the battery compartment ). A screwdriver is handy if you don't already have a Torx screwdriver. Enough parts for two controllers. $12 is a bit pricey, but it's a vanity thing. It will not help your controller perform better. It's easy for you to enjoy.
Sennheiser GSP 302 Gaming Headset: Noise-Cancelling Mic, Flip-to-Mute, Memory Foam Pads, for PC, Mac, Xbox One, PS4, Nintendo Switch, Smartphones
23 Review
Organize Your Nintendo Games With Sisma'S 72-Game Storage Case: Compatible With Switch And DS 3DS Cartridges - Grey
13 Review
Microsoft Xbox Wireless Controller Adapter for Windows 10 Black
25 Review
TV tuner Selenga HD980D black
37 Review