The Master Lock Set-Your-Own-Combination Padlock features a 20 mm wide aluminum body for enhanced corrosion resistance. This combination lock is best suited for indoor use, making it ideal for school lockers, gyms, travel luggage, suitcases, briefcases, backpacks, and more. The shackle, with a diameter of 3 mm, is 21 mm long and made of chrome-plated steel for added strength. The package includes 1 padlock in any color: green, blue, pink, or yellow. The lifetime limited warranty provides you with the assurance of a brand you can trust. Perfect for school lockers, gyms, travel luggage, and more. The 3 mm diameter steel shackle fits most luggage zippers. This small lock with an aluminum housing and brushed metal finish offers durability and corrosion resistance. The combination lock is an aluminum padlock with a 3-digit, adjustable combination for keyless convenience.