Oversized Pad Lock with Tamper Set Audio Alarm Option Extra Loud 110 DBA Sound Rating Tamper Proof Pad Lock Tamper Proof Alarm Audio is Optional, to use as a Regular Lock Simply Insert the Shackle w/ the Groove Away from the Key Large Size 2.5" Shackle Width (from End to End) Lock Height is Just Over 5" Includes 3-Keys and Extra Set of Batteries