Engineered with high-strength forged steel for optimized performance in heavy-duty applications. The following sizes are included: 1/4", 9/32", 5/16", 11/32",3/8", 7/16" 1/2, 9/16, 5/8, 11/16, 3/4, 13/16, 7/8, 15/16, 1/4" hex to 3/8" square Socket Adapter, 3" extension, 3/8" Universal Joint, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, 20mm, 21mm, 22mm, 23mm, 24mm.