The tri-wing screwdriver in the set is not the suitable size for the joycon's screws on the nintendo switch, you can unscrew them but only if you apply some force and you have to be very careful not to damage the screws because they tend to become stripped very easy, that last thing happened to me with the last

Correct sizes drivers to repair a Nintendo Switch Controller.

Is a very nice tool kit, great quality and size at a low price.