The ideal companion to the Master Gunsmith Screw Driver Set. This 277 piece kit is for the firearms owner and gunsmith. This set contains 12 each of 23 different "hard to find" screws that fit common applications in many guns. Screws are contained in handy storage kit and includes tweezers. KIT CONTAINS: #6-48 Fillister Head (7 different lengths) #6-48 Oval Head (7 different lengths) #8-40 Fillister head (3 different lengths) #8-40 Oval head (3 different lengths) #6-48 Plug Screws #8-40 Plug Screws #10-32 Plug Screws