Save your money. This lock is completely worthless. My daughter got one for her notebook, which she took to college; within a week, the lock decided to change the combo on it's own. Short of trying all 10000 possible combinations, she's stuck - we're cutting it off with a bolt cutter and then I'll work on getting rid of the combination dingleberry when she gets it home. My son purchased a lock which used a key several years ago - and had no problems. There may be good combination locks for notebooks, but this Targus one isn't it.