Nickel plated vintage style individual open geared guitar tuners with butterbean buttons, with brass gear. 14:1 ratio. Set of 6 tuners. For solid peghead. Most exact replacement for '30's thru '60's Martin and other guitars which had the original nickel Sta-tites. Shaft length 1 1/8", shaft diameter 1/4", distance between screw holes 29/32"(approximate).