Features Precision machined High quality alloy steel Comes complete in a metal case Sizes include: Machine: #4-40, #6-32, #8-32, #10-24, #10-32, #12-24 Standard: 1/4-20, 1/4-28, 1/4-24, 1/4-40, 5/16-18, 5/16-24, 3/8-16, 3/8-24, 7/16-14, 7/16-20, 1/2-13, 1/2-20,...