Check the listing for details. TonePros MSPRS-AN Metric (PRS Large Cap) Locking Studs Aged Nickel. Condition: New. Listed at 55.00 USD. TonePros now has a way to lock down wraparound bridges that virtually no one can detect by seeing the guitar. But by hearing the guitar, the difference is undeniable as resonant frequencies are transferred fully by 100% of both the Stud Top and Bottom. These TonePros Locking Studs offer the improved tone and playability that TonePros is known for on all their locking hardware, while also eliminating all wraparound “lean”. By clamping down on the tailpiece or the wraparound, intonation has never been easier. Raise or lower the locking stud posts using the TonePros wrench, adjust the wraparound, and then lock down the locking stud from the top. Set up, locked, and ready to go. Thread: 8mm x 1.25 Metric Material: Brass Stud Cap Size: 15.5mm/.61in