Feature:* Exquisite workmanship, corrosion-resistant and wear-resistant.* Screw padlock provides accurate locking screwdriver for longer service life by reducing screw and head wear.* Simply insert the tip of the screwdriver into the magnetic ring to remove the screw easily.* Screwdriver Magnetic will not magnetize your screwdriver or screw.*Perfect for 6.35mm hex head screwdriver.*Magnetic rings only in diameter (1/4 inch), not including other accessories in the picture! Specification: Product Name: Magnetic Ring Material: Alloy Color: Purple Length: (Approx.) 21mm Size: 6.35mm Suitable for: 6.35mm Flat Head Hex Screwdriver Quantity: 3pcs Package includes: 3 Magnetic Ring Note:1. Transition: 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.