These key blanks' grove face LEFT, please check your lock before placing a order! These key blanks are for Gen II lockers. Gen II lockers have master keys that allow administrator open any locker. If you lost keys to lockers, you can take these blanks to a locksmith to get duplicated. These key blanks' grooves have two directions, one type faces left, one type faces right. You would want to take a quick survey of your keys and email us how may of each do you need. The benefit of two groove directions is to reduce probability of one key accidental open other locks.