Special aluminum key lock body is constructed with a black vinyl-covered for great endurability. CINCINNO’s Aluminum Padlock has a 1-9/16 inch (40 mm) wide lock body; 1/4 inch (6 mm) diameter shackle with 7/8 inch (22 mm) length, 13/16 inch (21 mm) width Pad lock equipped with a four-pin brass tumbler cylinder for pick and pry resistance For indoor and outdoor use; lock and key is perfect for all types of backpacks, briefcases, tackle boxes, lockers and storage locks. Each Set of 8 Locks keys are alike. Each Set comes with 8 keys