Xena Xx-10 Disc Lock with Alarm Features Brand-new design with a flared, attack-resistant body shape Straps to your brake-disc like a well-fitted glove High nickel-content stainless-steel mono-block construction and piercing alarm Shorter, squatter body gives it a sport and streetbike-oriented fit profile 10mm double-locking, carbide-reinforced hardened-steel locking pin Shock and motion sensors linked to a sophisticated microprocessor trigger a 120 dB alarm Self-arming, with no on-off switch, re-sets automatically to armed mode within 15 seconds if the attack stops Alarm module with CR2 battery Stainless Steel, 10mm pin