Exclusive shock-resistant rubber cap protects the Jamar Stainless Steel Gauge. Wrist strip prevents accidental damage. High-quality, die-cast aluminum five-position handle adjusts to grip spans ranging from 1 3/8" – 3 3/8". Measures isometric grip force from 0 – 200 lb. or 90 kg. Includes instructions, norms and a carrying/storage case. One-year warranty.