U-locks are used to secure high-quality bicycles. Trelock shackle locks are particularly light and secure - with a shackle tear resistance of up to 7 tons, the shackle locks withstand even the most brutal break-in attempts. Trelock protects steel cables or locking bodies with its own technology: Armadon 360º armouring. Specially shaped steel bodies encase the "sticking points" preferred by professional thieves.