This assortment kit includes 12 of the most common sizes of type 316 stainless steel phillips flat head machine threaded screws. The sizes included are: 8-32 x 1/4", 8-32 x 1/2", 8-32 x 3/4", 8-32 x 1", 10-32 x 1/2", 10-32 x 3/4", 10-32 x 1", 10-32 x 1-1/2", 1/4-20 x 1/2", 1/4-20 x 3/4", 1/4-20 x 1" & 1/4-20 x 1-1/2" . A total of 210 top grade stainless fully threaded flat head machine screws all neatly stored in a durable (7"x4"x1-1/2") Tuff-Tainer storage box. Also every kit includes a valuable, custom made Marine Bolt Supply refrigerator magnet.