Klein Tools Multi-Bit Punchdown Screwdriver / Nut Driver Gives You The Convenience Of Manually Punching Down Wall Jacks and Patch Panels. With Its Machined Tool Steel For Greater Strength, This Product Comes With Multi-Bits to Make Your Job Easier. Shaft Holds 4 Universal Tips and Converts to 2 Nut Driver Sizes and 1 Hex Driver. Great For Use On 110 Terminal/Patch Panel and 66 Patch Panels.