This professional joystick repair tool kit includes T12 and 245 two types of heating cores plus two specifications of high-purity red copper heating bases, designed for safe disassembly and replacement of game controller analog joysticks. Adopting premium red copper material with superior thermal conductivity, it features fast heating and even heat transfer to effectively prevent damage to controller internal components during maintenance. Two base sizes cover mainstream controllers: the 13mm base fits PS4, PS5, Xbox and Switch Pro small joysticks, while the 16mm base is exclusively for Xbox 360 large joysticks.