Size: 5/16"Overall Length: 9"Handle Width: 5-1/8"Material: Hardened Alloy SteelDesigned To Be Inserted Into A Like-Sized, Hollow Recess Of A Socket Screw To Manually Tighten Or Loosen The FastenerCushioned, Curved Handle Increases Comfort And Reduces FatigueHandle Is Welded Directly To Key For Stability And Longer LifeHeavy Duty Handle Generates A Flywheel Effect For Super Fast Insertion Or Removal Of Screws