The Chirp 3-in-1 Muscle Roller is designed to increase blood flow to repair torn, overworked, tight, and sore muscles. It features a unique interchangeable handle and three unique Chirp Wheels that are designed to offer varying levels of surface pressure. BENEFITS: The Chirp 3-in-1 Muscle Roller is the perfect solution for anyone looking to speed up recovery and eliminate down time from their favorite activities Utilizes rolling massage therapy that provides pain relief, speeding recovery and increased blood flow By increasing blood flow, it aids the body in naturally pumping out waste, and bringing fresh oxygenated blood into tired muscles DESIGN & FEATURES: Chirp FOCUS Wheel: The 4" Chirp Wheel Plus is designed with extra padding and a patent pending spinal canal. This can be used for rolling out tight muscles on the back or neck. It is most beneficial when used on sore muscles that are too tender for a deep massage Chirp Sport Wheel: The 4" Rigid Sport Wheel has 2mm of padding to allow for firm, even pressure on tight muscles Chirp XR (Extreme Relief) Wheel: The 4" XR Wheel is designed to apply the most amount of pressure on the deepest and tightest muscles. The spiked surface is super-effective at hitting hard-to-reach muscle knots INCLUDES: One 15.5" Interchangeable Roller Handle One 4" Focus XR Deep Tissue Wheel One 4" Focus Plus Comfort Wheel One 4" Focus Sport Hard Surface Wheel, Quick Start Guide SPECS: Dimensions: 16.5" L x 4.5" W x 4.5" H Weight: 3 lbs. WARRANTY: 1 year warranty