The Gray Tools Insulated 7-pc SAE Nut Driver Set features an orange top insulation layer and a second yellow layer that acts as a visual safety indicator. The set contains sizes 3/16", 1/4", 5/16", 11/32", 3/8", 7/16", and 1/2". Each driver is individually insulated and tested to ASTM F1505 standards, providing user protection for up to 1,000V.