Finally, a chance to replace that Samick Tune-O-Matic bridge and replace it with a genuine Kluson USA bridge. This kit consists of unique offset conversion studs to convert your odd-sized bridge to conventional USA size Tune-O-Matic bridges. The larger section screws into the existing metric bridge inserts, leaving the smaller posts on top to accept a USA traditional tune-o-matic ABR-1 style bridge. These smaller posts are deliberately off-axis (not central) allowing you to twist both posts into perfect alignment with the USA ABR-1 bridge mounting holes. Larger section: 7.9mm diameter, 23mm lengthSmaller section: 3.4mm diameter, 16mm length Please note that metric thread thumbwheel screws, such as the ones that come with Gotoh tune-o-matic bridges, will not fit onto these conversion posts. If you need thumbwheels to fit, please see the Kluson KPTSETB here.