5/16-Inch Flat Head Screwdriver, Keystone Tip with 6-Inch Round Shank and Comfordome Handle Klein Tools BD156 Oversized handle is 35-percent larger than comparable screwdriver handles 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