Secure handling: The lock uses a 4-digit changeable code for simple daily operation, allowing quick locking and unlocking while maintaining reliable bike security. Versatile security: Compatible with disc brake holes larger than 7 mm; compact design fits various bikes and motorcycles; includes a reminder cord to prevent forgetting. Advanced anti-theft design: Millions of possible password combinations and a high-security mechanism reduce the risk of unauthorized access and provide strong protection in any situation. Durable zinc alloy: Built from zinc alloy to resist environmental exposure; rugged construction protects the internal mechanism and ensures long lasting performance. Key specifications: Code: 4-digit, changeable; Compatibility: disc brake holes > 7 mm; Material: zinc alloy; Includes reminder cord; Design: compact; Security: high-security with millions of combinations. Use scenarios: - Daily commuting: secure your bike at busy racks during work or class. - Quick errands: protect your bike while you run inside a shop or cafe. - Travel and outdoor activities: a compact lock that travels easily and adds protection when parked.