The patented design utilises sensor technology to detect nail differences between the live blood of your pet's quick, and the dead skin of the nail and claw. The new QuickFinder Nail Clipper designed for dogs between 18 and 35kg, cats, small animals and even birds! The Clippers utilise QuickSensor Technology that senses your pet's quick and gives visual cues as to when it is safe and when it is not safe to begin clipping. Red-Yellow-Green. Green means Go! It is fast, safe and easy to use. When it is safe to cut, when to be cautious, and when it is not safe to cut. The QuickFinder Clipper is not designed for high volume usage (e.g. grooming salons, veterinary offices, or animal shelters).