Meterk -theft Screw Socket Wrench Tool Master Locking Wheel Nut Key 816 / S 17mm Socket Replacement for A6 A3 A4 A5 NOTE: PLEASE MATCH IMAGE TO YOUR LOCKING NUT. Features: A Wheel locking key is a device designed to your wheels from being stolen. It wouldn't be such a great device if all cars had the same locking key. Your car could have one of hundreds of locking keys installed so it is important that you check the pictures match the locking nut on your car before purchasing. Specifications: Color: Silver Material: Steel Package size: 3.7 * 2.8 * 2.8cm Pacakge weight: 105g Package List: 1 * -theft Screw Socket Wrench Product Use Advice: Please lubricate locking nut before using this tool. Not to be used with impact . Tighten to correct torque for vehicle (Usually 110-120Nm - Check Manufacturers Recommendation). Not to be used with "overtightened" locking nuts (Nuts barely feel tight at correct torque). A Wheel locking key is a device designed to your wheels from being stolen. It wouldn't be such a great device if all cars had the same locking key. Your car could have one of hundreds of locking keys installed so it is important that you check the pictures match the locking nut on your car before purchasing.