Gibson shows Bob Dylan SJ-200 model

Grover’s original Rotomatic tuners are an engineering marvel, with style and performance exactly suited for the J-200 Standard. With a gear ratio of 14:1, the Rotomatics deliver precision tuning in a durable housing that provides maximum protection for the gear and string post. All moving parts are cut for gibson sj-200 custom mystic rosewood limited edition
 exact meshing, eliminating the possibility of slippage. A countersunk tension screw lets players regulate the tuning tension to any degree. A special lubricant inside the gear box provides smooth and accurate tuning stability. Grover’s original Rotomatic tuners are an engineering marvel, with style and performance exactly suited for the J-200 Standard. With a gear ratio of 14:1, the Rotomatics deliver precision tuning in a durable housing that provides maximum protection for the gear and string post. All moving parts are cut for exact meshing, eliminating the possibility of slippage. A countersunk tension screw lets players regulate the tuning tension to any degree. A special lubricant inside the gear box provides smooth and accurate tuning stability.