A shackle-style lock with it's disk-like shape and stainless steel jacket provides greater protection against forced entry because it is much more difficult to cut, pry, file or hammer than regular locks. 2-3/4"-diameter x 7/8"-thick lock, hasp total length of 5-1/2" x 1-1/2". Four pre-milled 3/8" mounting holes each on hasp and eye; can be mounted on wood, metal, concrete or brick (mounting hardware not included.) Set weight 20 oz. Manufacturer's Lifetime Warranty.