EN17092 abrasion resistance is carried out on a Darmstadt impact abrasion machine rather than the previous Cambridge abrasion machine. The Darmstadt was developed at a similar time but was not adopted by European Committee for Standardization. It involves dropping the test specimen onto a block of concrete and assessing whether the layer that would be closest to the skin forms a hole of 5mm or more. The specimen is held on the outer edge of a rotating arm and is travelling at speeds of up to 707rpm when it hits the surface. As the specimen holder is no longer driven, once dropped, the sample will slide on the concrete surface until it stops due to surface friction between it and the concrete surface. Unlike the Cambridge machine, a slide time in seconds is not given therefore no direct comparison is readily available.