Sperzel® 6 In Line Tuning Machines.

Sperzel®’s feature a 12:1 gear ratio and sealed gears for maintenance-free lubrication. Threaded bushings and a rear pin allow installation without screws. Sperzel® tuning machines come with graduated posts to assist in eliminating the need for string trees by changing downward angle of the string after it passes through the nut. Great USA made tuning machines!