Locks fall into two main types: mechanical and electronic/smart. Mechanical ones include pin-tumbler, lever, wafer, disc-detainer, padlocks, and deadbolts. Electronic ones include keypad, RFID/card, and biometric systems. 🔒 They all work on one principle—aligning internal parts (pins, levers, wafers, or disks) so that only the correct key, code, card, or fingerprint can release the core and unlock it. Their main purposes are security (preventing theft or unauthorized entry), access control (dec