ActiVet UnderCoater DUO - German Grooming Brush 4.5 cm 2 Brushes in 1!!! A breakthrough in brush technology. Flexible headed brushes glide through the toughest of mats without damage to your pets coat. Ergonomically designed to reduce strain to the arm and wrist, alleviating Repetitive Motion Syndrome (R.M.S). Less snagging, less ripping, easy to use, durable, waterproof. Stainless steel pins will last for years.