Master Lock Hasp/Hidden Shackle Padlock Combo 770-6271 "Bolt Cutter Tough" fully shielded hardened steel shackle offers impossible to cut and pry resistance features. This lock is also available with the BumpStop Technology. Search 770-6271N in Amazons search window. Lock: High security 6-pin hardened die-cast steel body is strong, durable and resists corrosion. Hasp: Solid steel powder coated construction. To install: Use hasp as mounting template. A 1/4" gap is recommended for most applications. Mounting hardware not included. Six 3/8 carriage bolts (length determined by application), washers and nuts required per unit.