Kryptonite Evolution Series 4 Disc Lock - Black 999607Double deadbolt design give additional protection against twist attacks 14mm hardened MAX Performance steel shackle Includes 3 keys 2,I keys and 1 with a high intensity LED bulb for convenient, easy unlocking in the dark New patent pending, reinforced oval crossbar design is stronger than a typical round tube Disc cylinder now includes a new anti float feature to keep the discs from moving and re adjusting when in transit Available in multiple colors