This set contains our most popular 3/8” drive 6 point sockets and universals with extended range metric sizes up to 22mm. Also included is a 3” extension, universal joint and 1/4" hex to 3/8” square adapter for use with hex drive impact tools. All packed in a compact, low profile, blow molded storage case which can be used as a tool box organizer when the cover is removed. 
81 piece set contents:
12 Pieces Fractional Standard Length: 5/16”, 3/8”, 7/16”, 1/2”, 9/16”, 5/8”, 11/16”, 3/4”, 13/16”, 7/8”, 15/16”, 1”
12 Pieces Fractional Deep Length: 5/16”, 3/8”, 7/16”, 1/2”, 9/16”, 5/8”, 11/16”, 3/4”, 13/16”, 7/8”, 15/16”, 1”
16 Pieces Metric Standard Length: 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, 20mm, 21mm, 22mm
16 Pieces Metric Deep Length: 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, 20mm, 21mm, 22mm
12 Pieces Standard Length Fractional Universal: 5/16”, 3/8”, 7/16”, 1/2”, 9/16”, 5/8”, 11/16”, 3/4”, 13/16”, 7/8”, 15/16”, 1”
10 Pieces Standard Length Metric Universal: 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm
1 Piece Each: 3” Extension, Universal Joint, 1/4” Hex x 3/8” Square Adapter
Molded Storage Case