I got these as a christmas present last year, they are simply the best tea towel holders I have ever seen. Inside the wooden jaws is a small marble that can move vertically. You just slide in the tea towel and the marble falls down and you can let go and the weight of the towel wedges the marble onto the towel holding it in place. Then to remove you just pull upwards and sideways and the towel comes out. Beautifully simple.
