The set contains 10 keys of the best steel on the market, coated handle for better grip. The sizes of the set are as follows: 3/32, 7/64, 1/8, 9/64 (flat tip) & 5/32, 3/16, 5/32, 3/16, 7/32, 1/4, 5/16, 3/8 (spherical tip) key support as in the photo included.