Ridgid's incredibly durable portable vise. It uses a chain clamp to securely hold pipes from 1/8 to 6 inches in diameter. Whether you're working with steel, copper or PVC, this vise can handle any material. The Ridgid Tristand folds up for easy transportation, and there's a convenient carrying handle and self-locking lock. When you arrive at site, set up takes seconds. The folding legs easily lock into place and you have a stable work surface right away. Another cool feature is a special tab for attaching grounding when welding. There's a sturdy tool tray for your convenience. Everything you need is always at your fingertips!