1/2" thick precision steel parallel set 8 pairs/set 0.0002" accu. #703-1/2

8 pairs 1/2" thickness precision steel parallel set. All 6" long. Made of high quality hardened steel. Precision ground. Within 0.0002" in parallelism. Paired 0.0002" in height Inluding 1 pair of the following heights: 1/2 x 7/8--------5/16 hole 1/2 x 1----------5/16 hole 1/2 x 1-1/8-----3/8 hole 1/2 x 1-1/4-----3/8 hole 1/2 x 1-3/8-----7/16 hole 1/2 x 1-1/2-----7/17 hole 1/2 x 1-5/8-----1/2 hole 1/2 x 1-3/4-----1/2 hole Fitted in deluxe plastic box.