HARDENED STEEL CONSTRUCTION - This u bike lock features a 14mm hardened steel shackle that laughs in the face of bolt cutters and hammers, giving you rock-solid protection PICK RESISTANT DESIGN - The anti-rotation deadbolt system makes lock picking nearly impossible, while the coated cable adds another layer of cut-resistant security for your ride FITS MOST BICYCLES - With 9"x4 shackle dimensions and a flexible cable, this u lock works with road bikes, mountain bikes, and frames of all sizes without breaking a sweat COMPLETE SECURITY SYSTEM - You get everything needed to lock up tight: two rust-resistant keys, mounting hardware, and a 4ft cable that secures both wheels and frame together EBIKE COMPATIBLE - Whether you're securing an electric bike or traditional bicycle, this heavy-duty lock system handles the job with the strength and reliability you need daily