These are heavy duty EXACT replacements for grover Rotomatics- Brand new fresh retail packed- A gorgeous and very high quality replacement
for vintage USA Grover Rotomatic tuning machines. These mount in the same hole and utilize the exact same screw placement. If your old machines are shot- you don't want to drill holes in your headstock- do you?
I can find no functional difference between these excellent tuners and the far more expensive "branded" models, and the beautiful cast machines really are smooth as hell!-