Klein Tools K46 5/16-Inch Slotted Screw-Holding Flat Head Screwdriver with 6-Inch Round Shank and Comfordome Handle Split-blade screw-holding driver wedges into screw slot Positive gripping action holds, starts, and drives slotted screws in awkward, hard-to-reach places Not designed for torquing or tightening Klein Tools doesn't just make great products, we make great products that stand up to the demands of the professionals who use them every day ... Since 1857