Smartkey, 1-1/8" laminated steel padlock, with 1-1/8" molybdenum shackle, features smartkey re-key technology for bump & pick resistance, uses kw1 keyway, easily re-key your padlock to work with the key from any kwikset smartkey lock, hardened molybdenum shackle for superior resistance to sawing & cutting, 10,000 lb cut resistance, dual ball bearing locking for maximum protection from pry & hammer attacks, over 5,000 lb pry resistance, key retaining feature ensures padlock is not left unlocked & prevents accidentally locking the key inside a shed, toolbox, locker, etc.