- Heat Treated- Choice of Sae Or Metric Sizes- Sae Sizes8 Pcs: 3/8, 7/16, 1/2, 9/16, 5/8, 11/16, 3/4 & 13/16 Inch1 Pc: Socket Holder or Metal Box.- Metric Sizes8 Pcs: 10, 11, 12, 13, 14, 16, 17 & 19 mm1 Pc: Socket Holde