These are the Darrel Ralph "CPU" thumbstuds. This thumbstud design adds a sharp look to your blade and offers one of the best grip surfaces available. With a barrel length of .255", this design also adds accessibility on medium to large folding knives. It can be used as a stand-alone stud, or as a thumber-stop, using the frame bolster as the blade stop. It can also be used as a single or dual head design, as both heads are threaded.
To use this thumbstud system, drill a 3/16 hole in the blade. Then screw the two halves of the thumber into each other, using the supplied threaded rod. Assembly requires padded pliers to tighten the heads (can be used as a single-sided stud).
TSCPUL = .255 height x .250 head x .1875 step
(1) set = (2) heads + (1) 6-32 Threaded stud
MADE in USA