No. 1 XL, Square Recess Screwdriver, 6-1/4" Blade, 1000V Insulated, Gray Tools, Mfr#: RB221-I

Tip Size: No. 1. Features an orange top insulation layer, and a second yellow layer that also serves as a visual safety indicator. Provides user protection for up to 1000 V. Individually insulated and tested to ASTM F1505 standards.