11/4 SHANK: The 1/4 inch hex shank of the double ended screwdriver bits add grip and allow for quick, simple, and convenient bit changes, very convenient 2STRONG MAGNETIC: The screwdriver bits have a very strong magnet tip with a powerful magnet that can easily pick up and fix the screw without slipping or falling off, and there is no longer the trouble of dropping the screw. And the magnetism will not decay after repeated use, the magnet is stronger than other magnets, there is no weak magnet problem 3FIRM GRIP: Screws can be grasped easily and quickly, and non slip fine teeth ensure that each edge fits more closely, you can use with confidence 4NON SLIP: With fewer bumps, the screws are accurately locked and secured, preventing the cross head bit from sliding or closing, stable and durable 5STABLE AND EFFICIENT: The magnetic screwdriver bit is straight and concentric, which effectively reduce the swing of the magnetic p2 bit and improve the work efficiency 2 x ScrewdriverBits