The Ultra 410 features a 12mm double-bolting temper hardened steel shackle providing protection against cutting and torsion attacks in a simple design. It includes an easy to mount, rattle free bracket and comes in a variety sizes and packages. Features: 12mm thick round temper hardened steel shackle Innovative pass through shackle with cutouts increases twisting and cutting resistance Easy to use mounting bracket fits most frames Patented double layer key design reduces breakage Security Rating: 8 of 15 5.5 inch height Specs: Cable Included Yes Lock Style Keyed