Choose one or two studs for your folder (sold each).
Thumb Disc - has an outside diameter of .370″, allowing it to fit into a 3/8″ (.375″) counterbore. Overall disc height is .070″ with a .050″ shoulder height. Disc is drilled and counterbored for our supplied titanium .110″ long thread length, 2-56 SHORT socket head screw.
Thumb Studs - sized as noted. Connector sold separately.