It consists of 6 folding joint that the need for cumbersome folding and can rotated 360 degree You can easily remove the to your bike, very convenience. It can effectively prevents bicycles thefts and property damage Comes With 2 you can take a for daily use and store the other at homes if lose it The folding can attach to the seatpost with fastener, or it can attach to the Bicycles frame with screws High strength metal, strong, cut and shear resistant and withstands high torsions and tension, Manufacturer: Zeizafa