RIDGID 40220 461 Straight Pipe Welding Vise, 1/2-inch to 8-inch Pipe Welding Clamp Designed for secure clamping onto straight pipes; pipe welding vise is available in straight, angle, elbow and flange styles Constructed of durable, performance-proven material for reliable, long-lasting use Straight welding vise resists strain, heat and warping during tacking Machined swivel nuts and pins combined with special chain screws allow for smooth, trouble-free vise assembly onto the pipe Straight pipe welding vise has a 1/2-inch to 8-inch (15 mm to 200 mm) pipe capacity