1.The Jaswell grooming tool will work through those tough matt's and tangles working on all types of coats, dogs, cats and other long haired pets. The two sided comb helps work through stubborn matt's and providing protection without scratching the pets undercoat. The anti-slip rubber and ergonomic handle gives you comfort grip. 2.The 9 teeth side as a de-matting rake for stubborn matts and tangles. The 17 teeth side as an undercoat rake for faster results thinning and de-shedding. The two sided comb helps work through stubborn matt's and providing protection without scratching the pets undercoat. 3.This design provides much safer experience than the traditional sickle shape matts combs .The tool has sharp teeth to prevent pulling hairs. The rounded ends make it safer on skin as an undercoat brush. 4.Our stainless steel teeth are strong and sharp to last for years. The de-shedding brush / undercoat rake are quality controlled during the process of manufacturing. The anti-slip rubber and ergonomic handle gives you comfort-grip.