A pair of Tricams: on the right, a nylon size 2.0, and on the left, a Dyneema size 1.5.
A tricam is a type of climbing protection equipment.[1]
A versatile nut/cam hybrid, the Tricam was invented by Greg Lowe in 1973, and came to market in 1981. They are currently manufactured by C.A.M.P. of Premana Italy.