Keeper Brinks 171-42201 40mm Solid Brass Padlock with 2-1/2" Shackle, 2 Pack Pack of (2) 40mm high security locks, keyed alike Solid brass lock body resists corrosion 2-1/2" chrome plated hardened steel shackle with 2,800 lbs cut strength Brass pin tumbler system and dual lever locking mechanism for increased security Lifetime Warranty