Swordfish 31400 - 60pc Square Head Set Screw Assortment Consists of:
 
An excellent assortment of Square Head Set Screws
Black oxide finish for extra strength
Include 6 sizes of 1/4"-20 x 3/4", 5/16"-18 x 3/4", 5/16"-18 x 1", 3/8"-16 x 3/4", 3/8"-16 x 1-1/4", 1/2"-12 x 1"
Organized in a pp storage case with chart inside box lid for quick identification