I decided that this excellent item is such a bargain that people should buy it even if they do not need it! I bought an intricately designed gold plated clock the size of my thumb at Harrods in London and when the battery died I needed to open the case and among the six sizes of tiny screwdrivers I found one that worked perfectly. Then I attacked a recalcitrant calculator with equally great results. In my experience Stanley products always have been reliable and I am more than content with the quality--these are sturdy and well made--they feel good in my hand.