These opened tuning pegs are a modern version of a vintage design. For 1-left/1-right slotted pegheads. For Most common 8-string Mandolins 2 x 4-on-plate (1-left/1-right) with mounting screws. 15: 1 gear ratio for fine tuning, a cast baseplate. the shaft fits in 1/4 inch or 6mm hole Come with bushings and screws. Heavy duty for a lifetime of use. Size: 110 * 40 * 35mm Weight: 134g material: metal Color: silver + black Package Contents: 2 set * Tuning Pegs(8pcs) 8 * washers 10 * screws Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.