Assortment kit consists of assorted head styles including; Round, Hex, Pan, Binder, and Fillister. Sizes include; 100- 4-40 x 1/4 to 1", 100- 6-32 x 1/4 to 5/8", 100- 8-32 x 1/4 to 3/4", 100- 10-32 x 1/4 to 1/2", 30- 1/4-20 x 1/4 to 3/4", Socket set screws in 4-40, 6-32, 8-32, 10-32, & 1/4-20. Hex nuts in 4-40, 6-32, 8-32, 10-32, & 1/4-20. Flat washer in #4, #6, #8, #10, & 1/4". All parts are natural Nylon 6/6.