Heavy Duty Steel Alarm Padlock, Item Description, Ideal for sheds, caravans, gates, bikes, motorcycles etc. Pick resistant keyhole, Batteries not accessible when locked,Padlock measures approx. 122mm (4.75 inches) high, Weatherproof, Long life batteries included and pre fitted, 3 special cut keys. To set the lock alarm simply remove the shackle,turn it round and push the shackle into the housing and turn the key. The unit will emit a short bleep to indicate that the alarm is activated. If the padlock is disturbed, it will activate the full alarm. Powered by Turbo Lister More items to explore.