The Nsi Uc-110 Bronze Heavy Duty U-Bolt Clamp Is Designed to Grip 7/8" to 1" Rods and Ground 1/2" to 3/4" Ips Pipes In Parallel or 90-Degree Positions With An Easily Adjusted, Durably Strong Design. The High-Copper-Content Alloy Of The Clamp Provides Excellent Conductivity and Heavy-Duty Strength, Alongside The Silicon Bronze Nuts and Lockwashers. Use This U-Bolt For Demanding Applications In Harsh Environments, Including Direct Burial In Earth or Concrete. Ul Listed 467 For Grounding and Bonding. Stock PR