Tremolo arm right for our tremolos LockMeister, Schaller Tremolo and Vintage. Schaller's tremolo arms are manufactured with a high degree of precision and provide a perfect fit. The special socket-and-screw construction makes it possible to finely adjust the arm's turning resistance, so you can set it as tight or as loose as you want. This tremolo arm fits on all standard tremolo systems. Supplied complete with socket; also supplied with one replacement screw for the socket.