The Mathey Dearman Double Chain Clamp 10"-54" is a robust and versatile tool engineered for precise reforming and alignment of pipes to schedule, ensuring optimal fit-up for welding applications. This standard version features nickel plated high-strength leaf chains and extra heavy-duty stainless steel jackbars for robust performance and durability on demanding job sites. Each clamp features a double chain main block with two fine adjustments, allowing for accurate and controlled pipe manipulation. This model, D251-1054, is equipped with 14 jackbars and is designed to handle a pipe size range of 10" to 54" (273 to 1,372 mm), aligning pipes to schedule 80 / 160. All clamps are supplied with essential accessories including a jackscrew breaker bar with socket and a comprehensive parts and operating manual. For enhanced functionality, this specific model also includes a level and support device, making it ideal for various pipe fabrication tasks. The clamp's engineering calculations are based on pipe with a tensile strength of 45,000 lbs per square inch (3,164 kg per square centimeter), ensuring reliable performance. SPECIFICATIONS • Manufacturer Catalog Number: D251-1054 • Number of Main Blocks: 1 • Number of Jackbars: 14 • Pipe Size Range (Imperial): 10" - 54" • Pipe Size Range (Metric): 273 - 1,372 mm • Pipe Schedule Alignment: 80 / 160 • Chain Material: Nickel Plated high-strength leaf chains • Jackbar Material: Extra heavy-duty stainless steel • Included Accessories: Jackscrew breaker bar with socket, Parts and operating manual, Level and support device • Engineering Basis: Calculations based on pipe with a tensile strength of 45,000 lbs per square inch (3,164 kg per square centimeter) • Shipping Weight: 300 lbs • Shipping Dimensions: 27 inches (Length) x 17 inches (Width) x 19 inches (Height)