Safari Undercoat Dog Rakes penetrate deep to remove undercoats. The single row undercoat dog rake is designed for longhaired dogs while the double row dog rake features two pin lengths for dogs with thick, heavy coats. Both designs feature precision tapered pins that penetrate deep into your dogs coat. Safari Undercoat Dog Rakes with rotating pins gently pull through the coat to remove tangles and prevent mats. The single row dog rake with rotating pins is designed for breeds with a medium undercoat while the double row is for breeds with a thick, dense undercoat.