American Lock® Aluminum Padlocks Heavy-duty, keyed differently, aluminum lockout padlocks feature an anodized 11⁄2" wide body, case-hardened, triple-plated shackle and cover plate. This lock has a 3⁄4" body thickness, 1⁄4" shackle diameter and a 5-pin rekeyable cylinder offering 10,000 key changes to minimize risk of key duplication. Choose 1", 11⁄2" or 3" shackle length in blue, gold, or red. Master key and keyed alike configurations, and other colors available upon request.