- Heat Treated- Choice of Sae Or Metric Sizes- Sae Sizes8 Pcs: 3/16, 7/32, 1/4, 9/32, 5/16, 11/32, 3/8 & 7/16 Inch1 Pc: Socket Holder or Metal Box.- Metric Sizes8 Pcs: 5.5, 6, 7, 8, 9, 10, 11 & 12 mm1 Pc: Socket Holder