Product Description 1-9/16", 40 mm, Aluminum Padlock With 7/8" Case Hardened Shackle, 1/4" Diameter Shackle, 4 Pin Tumbler Security, Uses Master Lock Key Blank K130BOX Or Alco M13-1092Ds TV #342-543, Carded. The product is manufactured in China. Easy installation and easy handling. From the Manufacturer The Master Lock Fortress Solid Body Brass Padlock is 1-9/16 inches wide with a solid brass body and four-pin tumbler security. It is keyed differently. Other features include case hardened steel shackles. Master Lock offers a full line of padlocks, chains, cables, and specialty locks for all of your needs.