Versatile Nut Setting: Fits 5/16" Nuts, Compatible with Popular Drills & Drivers Impact-Ready Design: Suitable for Cordless Drills, but Not Recommended for Impact Guns Durable Construction: Heat-Treated Chrome Vanadium Steel Strong Magnetic Hold: Secures Fasteners for Easy Nut Setting Set of 25 Nut Setters: Ideal for Professional and DIY Use 25 Brand New Impact Ready Magnetic Nut SettersModel Number: IMNS516 2-9/16" Long All 25 Nutsetters Have A 5/16" 6 Point Socket End1/4" Hex Shank Heat Treated Chrome Vanadium Steel Strong Magnets hold fasteners securely Works In all Drills And Drivers Such As Dewalt, Makita, Milwaukee, Craftsman, Ridgid And So OnAll 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