Master Lock Password Plus Letters And Numbers 1534D- Silver The Master Lock Password Plus Combination Padlock is a high-quality security solution designed for both indoor and outdoor use. It features a durable steel body and shackle, with an interior shackle width and height of 1 1/2 inches and a shackle diameter of 5/8 inches. The resettable combination type provides added convenience and flexibility for users. This padlock is ideal for businesses and industrial facilities looking to enhance their access control measures with a reliable and trusted brand like Master Lock.