Features:_x000D_1. Made of metal, good workmanship, high precision. _x000D_2. Each edges can be accurately locked screws, no damage to the screws and the screwdriver head._x000D_3. Anti-impacts and durable, great wear resistant. Precision Screwdriver Fit for electric screwdrivers, hand screwdrivers, electric drills, air drills and so on._x000D_4. As a Extension bar, insert into the handle to lengthen the tool handle, which is great helpful for when you meet deep set screws._x000D_5. Different colors and sizes optional, great accessory for screwdriver._x000D_Notice:_x000D_1. Actual color may be slightly different from the image due to different monitor and light effect. Please allow minor deviation due to manual measurement._x000D_Specification:_x000D_Type: Screwdriver Magnetizer Ring_x000D_Material: metal_x000D_Size: as picture shows. Note: Black inner diameter is 1mm smaller than other colors_x000D_Instructions:_x000D_1. Insert the magnetic ring into the 6.35mm bit to connect._x000D_2. Confirm that the magnetic ring is fixed on the batch head._x000D_3. Place the screws on the bit after insert the magnetic ring._x000D_4. Strong magnetic prevents the screws from falling off.Package List:_x000D_1 x Magnetizer Ring