Product Description. Very handy gage to quickly determine the pitch of various threads. Made of high quality polished tool steel. Features a locking device at both ends to securely lock the leaves. All leaves clearly marked with size. Comes in a plastic pouch. Pitches included: 4, 4-1/2, 5, 5-1/2, 6, 7, 8, 9, 10, 11, 11-1/2,12, 13, 14, 15, 16, 18, 20, 22, 24,26,27,28, 30,32,34, 36,38,40,42