RockyMounts Carlito Aluminum U-LockRockyMounts Carlito Aluminum U-Lock is the lightest U-Lock on the market. Weighing less than one pound, the RockyMounts Carlito Aluminum U-Lock can be easily fit in your pocket or bag and not weigh you down. A silicone overmold gives the lock great grip in all conditions and covers the entire alloy shackle. The shackle comes with a security level of 4 and a lifetime warranty.815189020523