This set of 2 x 2 Schaller BM Bass Tuners are used on a lot of Music Man, Gibson and G&L basses and feature a 1:20 gear ratio for tuning up quickly and accurately. The 4 screws per tuner (included) fix the machine heads to the back of the headstock and the knurled push fit bushing secures the string post on the front of the headstock.

These tuners come set up for 2 x 2 headstocks as standard but the worm gear/button shaft can be removed and reassembled flipped over to change these to a 3 x 1 set or 4 in line set for either right or left handed bass guitars.

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