Schlage 994831 Solid Steel Round Padlock, 63.5mm, 2.5-Inch Shackle, 2-Count Keyed Alike Hardened solid steel padlock body (63.5mm) with 2 1/2" Molybdenum shackle for increased security Double deadbolt locking provides greater strength High security 6-pin brass cylinder 2-pack, keyed alike, includes 4 keys Perfect for use in moderate to high crime areas