The mechanical dobby is a program bar with pegs system. The numbered holes in the program bars correspond with shafts of the loom. If you want a shaft to be lifted, you place a peg in the corresponding hole of the program bar. The number of program bars forming the chain, can be adapted to the weave pattern. However, if the number of program bars becomes very large, you may want to consider an electronic dobby.
Set of 10.