Artago BEST / SOLID Bicycle U-LOCK holder / U-lock bracket for under seat bicycle Top quality 100% METAL BRACKET - SOLID HIGH QUALITY - 2 YEARS WARRANTY INSTALLED ON THE SEAT SCREW UNDER SEAT OR ANY OTHER SAME SCREW ON THE BIKE FIT TO ALL TYPE OF U-LOCK THAT IN THE MARKET. THE MOST PRACTICAL AND EASY TO USE / INSTALLED.