Grotto Grip®.... Target, Activate and Train Proper Muscles for Writing™This patented, ergonomic pencil grip was designed and tested by pediatric occupational therapists specializing in handwriting. The Grotto Grip immediately decreases hand fatigue & pencil pressure and, with consistent use, increases writing endurance & pencil control while actually training the hand muscles to hold a writing utensil properly.Grotto Grip®.... Not just a comfort grip, but a powerful training tool: * finger guards and special angles place & hold the fingers into a mature tripod grasp by providing constant tactile feedback * maintains arches in the palm of the hand facilitating dynamic finger movements * facilitates an open web space between thumb and index finger * Prevents hyper-mobility at the joints of the index finger and thumb * OT recommended firmness for optimal joint stability and muscle action