“This is fabulous. My 5 year old plays cello - I now teach her after learning as a child and teenager. I spent most of my cello life swearing in frustration at my cello slipping on various types of flooring. This is brilliant. Compact. Well made. Can be used on ANY flooring with ANY chair with any type of end pin. I have previously bought the black hole and similar knock offs which they market at being the bees knees because you can supposedly just wash it to make it sticky again (makes no difference) and it hopelessly slips. The old wooden plank of timber with pre-drilled holes is cumbersome for the already overloaded cellist to drag to performances. Trust me- this is good!!!!!!”