Adjustable extended Ushaped lock shackle: The mechanical padlock has an extending Ushaped shackle that adjusts from 42 mm to 98 mm, suitable for file cabinets, wardrobes, and doors with different handle sizes. This allows for securing different furniture pieces with a single lock. Secure 4digit combination: Set your own 4digit code from 10,000 possible combinations. No keys or batteries needed. The mechanical password system offers reliable protection, keeping belongings accessible only to those who know the code. alloy steel construction: Made of quality alloy steel for strength and longlasting performance. Resistant to cutting, sawing, and tampering to protect valuables and sensitive documents, maintaining functionality over years of regular use. Modern minimalist aesthetic: Sleek contemporary design in silver or black. The clean lines and refined finish match any decor while providing essential security. Use scenarios: In an office, secure filing cabinets with sensitive documents. At home, safeguard wardrobes or storage compartments with different handle sizes. In classrooms or shared spaces, secure tool chests or mail slots.