5 Impact Magnetic Nut Setters This Is A Bulk Lot Meaning All The Nut Setters Are The Same Size Length: 6" Shank Size: 1/4" Hex Socket End Size: 5/16 " Laser Etched Size Markings For Quick And Easy Identification 1/4 Rapid Load Quick Change Hex Shank Fits All Drills And Power Drivers All Though These Are Made Tough To Be Used With Cordless Impact Drivers Please Be Aware That No Magnet In Any Nut Setter Is Designed For Impact Use So When You Use A Nut Setter With A Impact Gun At Some Point The Magnet Will Get Knocked Out From The Constant Slapping That Occurs Between The Magnet And The Fastener. The Only Way To Prevent This And Prolong The Life Of The Nut Setter Is To Use These In A Cordless Drill. We Will Replace Any Nut Setters Should There Be A Defect In The Strength Of The Metal But Will Not Replace Any Where The Magnets Have Been Knocked Out From Impact Guns