The Schaller GTM Nashville Tune-o-matic conversion posts have an 8 mm bottom thread and a 4 mm top post to convert a guitar with an 'import' style Tune-o-matic to a Gibson spec Nashville (pre 2012) or a metric ABR-1 style bridge.

The 8 mm threaded section will screw directly into the larger style body anchor bushings used by Gotoh and other metric 'import' guitar brands (Epiphone, Schecter, ESP/LTD etc.) so there is no need to remove the body bushings, the Nashville TOM/metric ABR-1 then mounts on to these posts, the integrated thumbwheels adjust the height of the posts.

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