Specifications:Material: S2 alloy steelColor:Blue(as pictures show)Length: 240MM (approximately)Inside Diameter :7MM(approximately)Quantity: 1PCSUsage:1. Insert the batch head into the magnetic steel sleeve for connection2. Confirm that the magnetic steel sleeve is fixed on the batch head3. Put the screws on the batch head where the magnetic steel sleeve is inserted4. Strong magnetism prevents screws from falling offPackage Contents:1 * Magnetic Ring★Reminder:Delivery time is 7-21 working days, if you do not receive the goods within 30 days, please contact us, We will track the shipment and get back to you as soon as possible with a reply. Our aim is to every customer satisfaction!Thank you!Note:1. Please allow error due to manual measurement. please make sure you do not mind before you bid.2. Due to lighting effects, monitor's brightness contrast se-ttings, there could be some slight differences in the color ton-e of the pictures and the actual item,this is normal, thank you for your understanding.3.Only the above package content, other products are not included.--Welcome to this shop, If you have any questions about this product, you can ask questions directly or contact us by email. We will answer your questions within 24 hours.--We provide perfect after-sales service,We apologize for the late reply during holidays (included Sundays),thank you for your understanding.