The TonePros TPFR Metric Roller Nashville Tune-o-matic Locking Bridge has roller saddles to keep the strings perfectly in tune after bending, especially useful with Bigsby style tremolo tailpieces. Set screws in the bridge body lock it to the height adjustment bridge posts which improves vibration transfer to the guitar body, eliminates rattles, removes any chance of the bridge falling off during string changes and stops the height adjustment accidentally being changed. The action can be adjusted via the thumbwheels as normal but slots in the top of the bridge posts allow easier height adjustment from above the bridge when it's in position with a flat head screwdriver. The TonePros TPFR has large 'import' style bridge posts that are direct replacements for bridges of the same style used heavily on Epiphone, ESP/LTD, Schecter and other guitars made in Japan and East Asia.