✅ THEFT-PROOF DESIGN Heavy Duty, Tough, and Drill Resistant, engineered to protect against Bolt Cutters and Hacksaws! Stop pickers, pullers, and drillers in their tracks! ✅ Easy To Use & Carry The bike locks with keys can be fixed on the bicycle seat tube with the attached mounting bracket. ✅ Widely Application The bike safety lock can be applied to most types of bicycles, such as electric bikes, scooter bikes, road bikes, mountain bikes, and folding bicycles. ✅ Waterproof & Dustproof The U Lock is waterproof, dustproof, and anti-scratch, It avoids rainwater penetration and prevents the lock core from rusting. The protective layer can ensure that the lock is prevented from being worn during use, so as to extend the service life of the lock, and it can also protect the bicycle from scratches.