The Klein Tools Keystone Screwdriver features a precision-machined 3/8" tip engineered for an exact fit on large flathead fasteners, making it the go-to choice for service panel work, wire trough cover installations, and heavy-duty electrical rough-in applications. Its 8" heat-treated round shank is reinforced with a hex bolster that enables wrench-assisted turning for maximum torque on stubborn fasteners. The Cushion-Grip™ handle with internal anti-twist flanges delivers all-day comfort and a solid, slip-free grip, while Tip-Ident® provides instant tip orientation at a glance.

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