The Faber NSWKIT steel conversion posts have a 5 mm bottom thread to convert a guitar with a Nashville style bridge to an ABR-1 style bridge. The threaded top section enables you to install a Faber Tone Lock Bridge.

The NSWKIT comes in two versions, metric and imperial, the metric version has a 4 mm top thread for mounting 'import' ABR-1 style bridges made in Asia like the Gotoh GE104B or the Faber ABRM. The imperial version has a 6-32 inch thread for mounting a Gibson ABR-1 bridge or the Faber ABRH.

The 5 mm threaded section will screw directly in to metric Nashville body bushings used by Schaller and Gibson USA guitars (even though most measurements are imperial on USA models, the Nashville bridge posts are 5 mm metric). The posts feature built in height adjustment thumbwheels.