With this Socket Head Screw Kit you will have on hand the most popular and most wanted Socket Head screws - ideal when setting a screw down really tight is important - at a really economical price. Lets you fit Socket Head Screws to the widest possible variety of bases, rings, sights and ribs because we've matched the correct head to the required thread size and length for you. Saves you time, hassle and inventory! You get a full selection - 168 Socket Head Screws: 1 dozen each of 14 different screws includes 8 Fillister Head and 6 Weaver Oval Head styles in 4 lengths and 3 thread sizes (6-40, 6-48 and 8-40). Then, when custom fitting is required, or you need to shorten Mfg: Brownells SPECS: Made for us in U.S. to same head/shape specs as the Slotted Sight Base Screws. 3/32'''' socket. Blued. Kit includes: 168 screws, compartmented Kit Box, Tweezers, Checker/Shortener Jig and Chart showing bases/rings/ribs/etc., that the screws fit. Refills sold 12 per Pak. 3/8'''' (9.5mm), &fr