In short:XENA's XUL series Bullett Locks range is one of the strongest U-Locks on the market made from stainless steel and with built-in alarm. Shock and movement sensors linked to a 110 dB alarm give them a further security dimension. Lock features

-block construction and a 6mm steel pushdown locking pin. Ice-spray proof and pick proof key and barrel.Alarm: Shock & motion sensors trigger a 120dB alarm powered by a single CR2 long-life Lithium battery. No tools required. Self-arming, with no on-off switch, re

-Bullett-Lock Alarm System-110dB Alarm-Key Arming-Shock & Movement SensorsWeight: 910gBatteries: 6 x LR44 1.5v Alkaline Disclock: N Manufacturer's Description: XENA XBL series Bullett locks: the world's first high-performance alarmed padlock. Extremely strong

profile and 14mm double-locking, carbide-reinforced hardened-steel locking pin. Freeze-spray proof, pick-proof key and barrel.Alarm: Shock & motion sensors trigger a piercing 120dB anti-theft alarm powered by a single CR2 long-life Lithium battery

construction and a 6mm steel pushdown locking pin. Ice-spray proof and pick proof key and barrel.Alarm: Shock & motion sensors linked to a sophisticated microprocessor trigger a 120dB alarm powered by a single CR2 long-life Lithium battery. All electronics

profile with 10mm double-locking, carbide-reinforced hardened-steel locking pin and pick-proof, freeze-spray proof key and barrel. Alarm: Shock & motion sensors trigger a piercing 120dB anti-theft alarm powered by a single CR2 Lithium battery. Self

Alarm features-Bullett-Lock Alarm System-110 dB Alarm-Key Arming-Shock & Movement SensorsWeight: 1,225gBatteries: 6 x LR44 1.5v Alkaline Disclock: N Manufacturer's Description: XENA XPL series Bullett locks: the world's first high-performance alarmed padlock