It is made of solid alloy steel which increases security level a lot! Combined with hard outer PC layer, its high quality is well protective.

Features:

• Key-free Unlocking - say goodbye to complicated unlocking ways, you can open this U-lock just with one click.
• Main Highlights - alloy lock cylinder, eco tube, 4-digit password, extra thick lock body.
• Hydraulic Shears Resistant - The lock body has undergone several times processes to improve its hardness and strength, it could effectively resist external damage.