Feature: * Exquisite workmanship, corrosion resistance and wear resistance. *Screw center ensures the accurate locking screwdriver has longer life by reducing screw and head wear. * Simply insert the tip of the screwdriver into the magnetic ring to remove the screw easily. *Perfect for 6.35mm thick hex screwdriver. *Magnetic rings in diameter only (1/4 inch), not including other accessories in the picture! Specification: Product Name: Magnetic Ring Material: Plastic Optional Color: Green Black, Orange Black Adapter: 6.35mm(1/4'') Hex Length: (approx.) 21mm Suitable for: 6.35mm Flat Head Hex Screwdriver Quantity: 1pc Package includes: 1 times; magnetic ring Note: 1. Passage: 1cm = 10mm = 0.39 inch. 2. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 3. Please allow slight manual measurement deviation for the data.