The Modular Flex Roller by Sharper Image can be configured different ways to target multiple muscle groups. Use it with all 4 rollers to apply even pressure to large areas (arm, leg, back, etc.) or just a single roller to pinpoint small areas. Includes a U-shaped flex handle, 2 grip handles and 8 rollers (4 soft and smooth, 4 semi-firm with texture). Compact design is ideal for travel, gym, sporting events and more.