Fits USA Fender, CRL, Oak Grigsby switch etc, will NOT fit an China/Japan/Korea made metric sized switch. It is typical for Tele style 3-way switch, but also can be used in Strat or Tele 3/4/5 ways level switch
The switch caps have a switch blade slot which length is about 4.9mm (3/16")
Made in Japan, Material: Plastic, round shape
Please check your switch blade is 4.9mm (3/16") wide before you buy