Master Lock - Hasp / Hidden Shackle Lock Combo 770-6271N w/ BumpStop Technology This listing is for one high security hasp and one hidden shackle padlocks keyed alike.. The lock and hasp is also available without the Bump Stop Technology, search 770 - 6271 in our storefront. These locks feature the BumpStop Advanced Cylinder Technology. (see explanation in the description below). Lock: High security 6-pin hardened diecast steel body is strong, durable and resists corrosion. Lock dimensions (see image) - A) 3/8 (10mm), B) 19/32 (15mm), C) 1-23/32 (44mm) Width 2-7/8 (73mm). 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.