PSO-KEY® 10-Pieces 5 colorsThis tiny PSO RITE is designed to mimic the fingertips. The PSO KEY is perfect for when you need a massage while in traffic, waiting in line, or at work. The PSO KEY helps relieve muscle tightness in your jaw, neck, forearms, feet, and hands. It's on your keys, so you'll never leave home without it! The 10 piece pack is a great self care gift for families, friends, and employees. Made in the USA. Patented D823,479 DIMENSIONS L = 2" W = 0. 866" H = .