2Pcs Yootones Guitar Tuning Pegs Keys 3R3L Machine Heads Tuners Set Compatible with Acoustic Folk Classical Guitar (Silver)

Compatible with 6 quality chrome machine heads for steel string acoustic guitars., Made of Zinc alloy buttons.Beautiful and practical., Durable and highly reliable for easy, smooth, and precise tuning., Post spacing: 29 mm; Shaft diameter: 6 mm; Shaft length: 28 mm, Gear ratio 1:15., With heavy duty internal gear, easy and labor-saving to replace and adjust string.