A Velcro equivalent fastener, supplied separately in two halves - Hook side and Loop side. Used for fixing curtains, valances, swags and tails and blinds to pelmet boards. Stick the loop tape to the back of lightweight window treatments (it is a good idea to also secure with a few hand stitches). Stick the hook tape around the edge of the pelmet board or blind batten, again you may wish to further secure with staples. See The Encyclopaedia of Curtains pages 202 and 228 for fixing examples.