Made of stainless steel with strong bearing. Strong and hardness, hold up to 170lbs! Cool and eye-catching appearance. Smooth and polished exterior for hand comfort. Lightweight and compact size with folding claws, very easy to carry and use. A shrapnel bolt to keep the gravity hook closed firmly. Additional hole is for the shrapnel bolt storage in the grapping hook, to keep the shrapnel bolt in place. For outdoor activities, survival training, adventures.