Buy it now is for not for one but Four metal key rings.
Ideal for personal use or gift to friend / customer.
They are intended for tightening small screws on sun glasses, reading or other glasses, maybe mobile phone.
Each one is 67 millimetres long and has a small hexagon socket at the end with a centre section which unscrews to reveal either a small flat blade or pozidrive / phillips / star driver.
If you check it out am sure you will find these on sale on ebay and optician shops but at a higher price, the selling costs on Tazbar are minimal so I pass it on to you.
Larger quantities available - can create a listing if you ask seller question.
Please see my other items.