Set of 4 Precision and durability with classic styling make these bass machine heads ideal for manufacturing or upgrading instruments. The die cast housing is a sturdy foundation for maintaining center lines of the worm and gear. A fixed bearing surface in the housing creates a smooth turning surface for easy tuning. The safety string post and ?elephant ear? button provide utility and a vintage look. Available in 4-in-line or 2+2 configurations. Bushings and wood screws included.