V-Hawk Forearm Wrist Roller - Wrist & Forearm Strengthener with Finger Exerciser, Forearm Workout Equipment Arm Blaster with Anti-Slip Grip Strength Trainer for Home and Gym Workout – The Home Fitness Corp
Redge Roll - wrist roller used by geekclimber in 30 days challenge
Wrist and Forearm Blaster - Wrist Roller & Forearm Roller for Training, Workout | eBay
Amazon.com : Wrist Blaster - Forearm, Hand and Wrist Exerciser (2.5 Inches, Sphere) : Sports & Outdoors