The Tick Nipper® doesn’t ‘grab’ the tick. Instead, its jaws ‘yoke’ loosely around the tick's narrow mouthparts. When you pull the tick out, those jaws exert pressure on the tick’s shoulders and pop it out.
The Tick Nipper®’s bowl-shaped jaws cradle the tick safely after liftoff. You need only one hand to use it, leaving your other hand free to tend the wound or comfort the victim.