Zirconium Thumb Studs #1 Thumb Studs (Zirconium) $12.00 #2 Thumb Studs (Zirconium) $12.00 #3 Thumb Studs (Zirconium) $12.00 #4 Thumb Studs (Zirconium) $12.00 #6 Thumb Studs (Zirconium) $14.00 #8 Thumb Studs (Zirconium) $12.00 Threaded Connector 2-56 (for Thumb Studs) $4.35 – $9.25