Pinnacle Tune-O-Matic TOM Locking Bridge & Posts w/ Titanium Saddles - Fits Gibson® & Heritage®Pinnacle [pink()l] (noun) the most successful point; the culmination. The Pinnacle locking system allows for maximum contact between the bridge and posts. Providing additional sustain and accentuates string attack. As with any locking bridge system, when you change the strings, the bridge stays place. The Pinnacle has a counter bore (concave radius) on the bridge base top and bottom side of the mounting holes. The bridge posts thumbwheels and caps