Welcome back to Ask the Expert. Today we have a question from Greg in Poland. Now Greg wants to know why nonwovens don't have grit sizes. Okay, easy to explain is to actually show you. So we have a piece of coated abrasive here, which is actually grade 180 and we have a nonwoven pad here, which also uses the same grit size of 180. Okay, so this is what we would call quite a fine sandpaper when we use this as on a surface, such as this here to sand down. Because this is what we call a monolayer product. We actually push these abrasive grains into the surface of the metal we're trying to abrade. And there's nowhere for the abrasive grain to escape. So we get the full effect of that grit size of 180. However, with a nonwoven product such as this hand pad, even when we use the exact same grit size, we have what we call like a sponge effect. So this acts like a spring. So when we push the hand pad and try to abrade the surface of the metal here, we don't get the full effect of the grain. Because that same particle size is allowed to push back inside this 3D, 3D soft material. So it kind of acts like the suspension of your car. The grit will not penetrate into the metal as hard as it would with a monolayer product like this sandpaper here. Same applies for a flat disk. This is grit A on a flat disk, so it will remove some material when you use it. Here we go. We have a nonwoven product which is grade coarse. Again, same particle size, but this will remove much material than the nonwoven product will due to that 3D sponge like effect. So that's why on nonwovens we don't use grit size. We use grays to explain how unaggressive the product will be. Hope that answers your question. Any more questions? Put them down in the comments below and we'll get back to you with an answer as soon as we can. Cheers. Thanks for watching.