Abus Pro Shield 5850ABUS 5850 Frame Lock The ABUS 5850 is a sturdy and reliable frame lock, designed to provide quick and convenient security for your bike. Mounted directly to the bike frame, this lock allows you to immobilize the rear wheel with just a turn of the key, making it an ideal everyday security solution. ART certified insurance approved in many countries Easy to use secure the bike in seconds with the integrated key system Fixed mounting attaches permanently