Looks like artist KAWS is up to his dirty tricks again. And by dirty tricks, I mean creative works of art. This time around, it’s a set of uniquely designed guitar picks that were made in collaboration with guitarist John Mayer. Each pick is signed and dated by both KAWS and Mayer and won’t be available to the general public. If you’re looking to get your hands on some, your best bet is probably a John Mayer concert in Japan.