Gotoh A7 Tremolo Arm. Gold Finish.

Used on these model tremolos:

EV510T, NS510T, 510T, VS100N, VG300, VS401, VS401V

The A7 tremolo arm is a combination of push-in / screw-in technology. The arm is primarily supported by the push-in bushing, which has a set screw to set the amount of swing tension on the arm. However, the arm is also threaded internally to prevent accidental removal of it during use.