The set contains 13 keys of the best steel on the market. The measures of the set are as follows: 0.50, 1/16, 5/64, 3/32, 7/64, 1/8, 9/64, 5/32, 3/16, 7/32, 1/4, 5/16, 3/8. the kt also includes the case in which they are inserted with the size of each individual key. .