Six-piece adjustable precision parallel set. The parallels are 5" long and 1/4" thick. Made of precision ground tool steel

Parallels are adjustable to the following sizes: 3/8" - 1/2", 1/2" - 11/16", 11/16" - 15/16", 15/16" - 1-5/16", 1-5/16" - 1-3/4", 1-3/4" - 2-1/4".

Parallel easily expanded to size in openings for quick reference measurements. Lock desired size by set screws provided. Exact size can be set with micrometer. Furnished in fitted plastic case with size range markings.