Abus 304 Disc Lock The Abus 304 Disc Lock promises robust security for your valuables with its highly pick-resistant Z key system. Tailored for hassle-free handling, the lock comes with the option to replace the key for continual convenience. Engineered with a body and locking mechanism forged from specially hardened steel, it stands as a formidable barrier against cutting and tampering efforts, ensuring your bike or precious items remain guarded. Features: Z key is user friendly and highly pick resistant (275, 277, 304) Key replaceable (277) Lock constructed from specially temper hardened steel (275, 277) Locking pin constructed from specially temper hardened steel (303, 304)