The is a 44 piece tool kit including Phillips, Reed & Prince, Slotted SAE and Metric MM Hex Bits. Great for working on American and foreign industrial equipment. This case is expandable with open stock bits and bit racks Features Shock resistant case with 5 removable racks Heat treated black oxide steel Includes Chapman midget 20 tooth, 18 degree working arc ratchet 3 1/2" extension Ergonomic, chemical resistant screw driver handle with metal insert 36 1/4" drive insert bits: Philips: 20, 21, 33 and 34 (Philips sizes 1,2,3 and 4) Allen Hexs: 3,4,5,6,7,8,9,,10,12,14,16,18 ( sizes .050", 1/16", 5/64", 3/32", 7/64", 1/8", 9/64", 5/32", 3/16", 7/32", 1/4", 5/16") Metric Allen: 40, 41,42,43,44,45,46 (sizes 1.5mm, 2.0mm, 2.5mm, 3.0mm, 4.0mm, 5.0mm, 6.0mm) Slotted or flat head insert bits with straight sided blades: 88,89,90,25,26,93,17,95,96,97,19 Reed and Prince (AKA Frearson) and 1/4" socket adapter. Made, hand assembled & inspected in Durham, CT from USA materials.