Universal Model (two piece strap-on design) 10, 20, 30 grams adjustable weight per finger. 5-sets and 10-sets Weight system: Stainless steel rods. Sets include: Leatherette Storage Pouch, Usage DVD, and Instruction Pamphlet. Finger Weights utilize the accepted principles of progressive weight training practiced by athletes and prescribed by doctors to both increase performance and prevent injury, and will increase your velocity, dexterity, endurance, and control – guaranteed!