3+3 Ratio Acoustic Open Back Tuners (PRN-3411, Select Finish)
![3+3 Ratio Acoustic Open Back Tuners (PRN-3411, Select Finish)](https://graphtech.com/cdn/shop/products/PRN-3411-G0-a-side.jpg?v=1642548440&width=1445)
RATIO® patented gear technologyRATIO® - Calibrated Machine Heads incorporate different string gauges into the tuning equation., From Low E to High E
The Original Grover Vertical Mount Sta-Tite machine head. The classic styling of the Vertical Mount Sta-Tite returns with the Grover name. The butter bean button identifies this as the original. An upgraded 18:1 gear ratio provides precise tuning. Vertical string post in 3 + 3 configuration. Wood screws, washers, and bushings included. Please Note: Grover tuning machines produced prior 1985 use different specifications for threading and shaft sizing.
![](https://media.sweetwater.com/m/products/image/d89f2d9bfbzq9Mh7pLqByiGVQiLmVmLidqjEPSOB.wm-lw.jpg?quality=82&width=750&ha=d89f2d9bfbdba107)
Grover STA-TITE V97-18NA Nickel
![](https://media.sweetwater.com/api/i/b-original__w-300__h-300__bg-ffffff__q-85__ha-b47506f98aefcaec__hmac-e4efdf370232cdeb6d31c26f85e886b3cf735930/images/items/350/PRN-4324-N0.jpg)
Graph Tech PRN-3411-N0 Ratio Acoustic 3+3 Open Back Tuning Machines - Skeleton Button / Nickel Finish
![](https://graphtech.com/cdn/shop/products/PRN-3422-N0_1.png?v=1623493421&width=1445)
3+3 Ratio Acoustic Guitar Machine Heads PRN-3422 | Graph Tech
The newest addition to the Grover family, these locking machine heads utilize the famous 18: 1 Rotomatic design with a thumb screw mechanism which locks the string into place. Insert the string through the post hole, wrap around once, then lock by tightening with the thumb screw. Perfect replacement for the most standard machine heads. Includes all mounting hardware. Includes 3 treble and 3 bass.
![](https://media.sweetwater.com/m/products/image/76ebdba05dxW1oHkAxiJfPG7iymzFTOtKv9kP5cz.jpg?quality=82&height=750&ha=76ebdba05d49e981)
Grover 502G Roto-Grip Locking Tuners Gold
![](https://cdn.shopify.com/s/files/1/2372/8913/files/Guitar_Headstock_3x3_9de00b30-4ef4-4cc7-9fe7-b8a585dca07f.png?v=1629836673)
RATIO 3x3 Acoustic Open Back Guitar Tuners PRN-3411
![](https://graphtech.com/cdn/shop/products/PRN-4324-N0single_3_04602c4b-4b0f-414c-9a89-13d1c85cc9b7.jpg?v=1642544089&width=1445)
Graph Tech Ratio 3+3 Retro Tuning Machine Heads Nickel 6 String
![](https://ucarecdn.com/e7450ec0-3789-4054-bab5-f7fe6656fcd2/-/format/auto/-/preview/3000x3000/-/quality/lightest/Invisomatch%20plates%20range%20of%206%20_web_.jpg)
RATIO 3x3 Acoustic Open Back Guitar Tuners PRN-3411
![](https://media.sweetwater.com/api/i/q-82__w-750__ha-14bc138b53e78820__hmac-c603b54e6d91629997af9c172fd2725aed17b9ac/images/closeup/750-PRN2731B0_detail1.jpg)
PRN-2731-B0 Ratio Electric 6-In-Line Tuned Machine Heads - Classic Style / Black Finish - Sweetwater
![](https://rvb-img.reverb.com/image/upload/s--bo7gvwVa--/a_0/f_auto,t_large/v1684534957/wfhxa55bnbhkanwsuejg.jpg)
Open Box - Unused - Graph Tech Ratio PRN-3411-NO Nickel 3x3 Acoustic Guitar Tuning Heads Machine Skeletonized
![](https://media.sweetwater.com/api/i/q-82__w-750__ha-dee27d1f62c8553b__hmac-b0e275e3c9cbc957ffd869d8c3c3287b8de92c80/images/closeup/750-PRN-2731-C0_detail1.jpg)
PRN-2731-C0 Ratio Electric 6-In-Line Tuned Machine Heads - Classic Style / Chrome Finish - Sweetwater
![](https://graphtech.com/cdn/shop/products/DSC_1605.jpg?v=1627777004&width=1946)
Graph Tech Tuners 3x3 Skeleton Button Nickel
Tuners, 6 Open Back, Skeleton Button Shape, and Ratio Technology - Nickel Finish
![](https://media.sweetwater.com/m/products/image/0df0dc58b8GgcWUseVOjR8QQIcTN4dDzeTePHIT3.wm-lw.jpg?quality=82&width=750&ha=0df0dc58b843c28e)
Graph Tech PRN-3411-N0 Ratio Acoustic 3+3 Open Back Tuning Machines - Skeleton Button / Nickel Finish
![](https://cf1.zzounds.com/media/productmedia/fit,2018by3200/quality,85/RN-3411-N0-ad0a2654e68350b3fc3e052d3366878c.jpeg)
Graph Tech Ratio Skeleton Button Guitar Tuners
![](https://media.sweetwater.com/api/i/q-82__w-750__ha-b69743dbebf3560e__hmac-65eb0b6de4f3b71448217be6afb22297c589fe87/images/closeup/750-PRL-8341-C0_detail2.jpg)
PRL-8341-C0 Ratio Electric 3+3 Locking Tuned Machine Heads - Vintage Style / Chrome Finish - Sweetwater
![](https://graphtech.com/cdn/shop/products/PRN-3411-G0-b-side.jpg?v=1628331862&width=1946)
Graph Tech Tuners 3x3 Skeleton Button Nickel