Set screw. Designed to replicate an "aged" look.

For matching aged hardware, please check out the rest of the Gotoh Relic series:

• Tele Bridge - P-GGT-85
• String Ferrules - P-GGT-87
• 6-in-a-line Tuners - P-GGT-81
• Strap Buttons - P-GGT-86-AC
• Neck Plate - P-GGT-89
• String Trees - P-GGT-92
• Control Plate - P-GGT-91