BD306 Klein Tools 5/16 SQ.

Screwdriver has oversized handle that is 35-percent larger than comparable screwdriver handles and delivers up to 50-Percent extra power to perform tough jobs with minimum effort
Tough amber, smooth Comfordome handle fits in the palm of the hand comfortably
Chrome-plated shaft helps prevent corrosion
Internal flanges provide solid, twist-resistant shaft anchor
Made in USA
Nickel-chrome, precision-forged and polished blades with black tips
Meets or exceeds applicable ASME / ANSI specifications