Abus 410K/150HB140 SH Ultra Mini + U-Lock - GreenThe 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. 12mm thick round temper hardened steel shackle Pass through, double bolting steel shackle provides anti twist protection Easy to use mounting bracket fits most frames Patented double layer key design reduces