They are ideal for pushing up against the leading edge of Resin Bound Stone or Rubber crumb/wet pour. This also helps keep the required depth of the material you are laying right up to the edge of where you have trowelled. A good tip for prolonging the life of your Kneeler is to use two of them aggregate bags to cover the pad extending its life and keeping it clean for a long time.
"Since I've started using Star Surfacing's knee pads my knees are no longer in agony at the end of the day. They don't ache at all, I don't even get red knees at the end of the day! My back has been so much better since I've been using these knee pads as well"