Magnetic Ring Metal Screwdriver Bit Electric Hex Head Lock Screw Magnetizer Kit Universal Magnetic Full Metal Alloy Screwdriver Drill Bit Ring Description: Made of premium material, it is durable. Using this magnetic snare on the bit can strengthen the magnetic force and positioning of the bit, and does not lose the magnetism. Please check the front and back when inserting the bit. If you need to disassemble it you only needs to force outward and just pull it, which is convenient and simple. Universal Magnetic Ring Alloy Magnetic Ring Screwdriver Bits Anti-corrosion Strong Magnetizer Drill Bit Magnetic Ring. Small size, easy to store and use very convenient. Specifications: Type: installed in double head 6.35mm Magnetic Ring Bit Color: Blue / Red / Yellow Material: S2 Alloy Steel Length: 21MM Inside Diameter: 7.3MM Usage: Insert the batch head into the magnetic steel sleeve for connection Confirm that the magnetic steel sleeve is fixed on the batch head Put the screws on the batch head where the magnetic steel sleeve is inserted Strong magnetism prevents screws from falling off  Package Included: 1x Magnetic Ring Bit