Pre drilled holes and included steel nails enable tool costless installation, while the compact black design ensures discreet yet sturdy for tubing in tight spaces Secure height, copper, and CPVC tubing with these 50 pack J Hook clamps featuring rust resistant steel nails and permanent construction for throb proof, long lasting pipe affiliations Perfect for securing water supply lines, bright heating systems, or industrial piping in basements, crawl spaces, and mechanical rooms with temperature resistance from 20°F to 180°F The bulk 50 piece set eliminates multiple purchases, providing uniform clamping strength across projects while maintaining compliance with standard height and CPVC tubing specifications Ideal for plumbers, HVAC technicians, and handbuilt enthusiasts seeking consistent, wear resistant clamps for residential or commercial plumbing projects, Manufacturer: ZBIianxer