The Leatherdos hair clip, created by Israeli industrial designer Yaacov Goldberg, is the most multi-functional thing you'll ever stick in your hair. It contains seven different tools including a trolley coin, flat Phillips screwdriver, small screwdriver, large screwdriver, wrench, ruler and cutter.
The Leatherdos clip is actually targeted towards men, particularly Jewish men who need a way to fasten their yarmulkes to their hair.
So not only is the Leatherdoos clip truly unisex in that it can be used by women or men to either tie their hair or their yarmulkes, it also allows you to carry out a range of other functions including cutting through rope, removing screws, assembling small furniture and even unlocking grocery carts.
Yaacov Goldberg's stainless steel Leatherdos hair clip and multipurpose tool is available for only $9.