Built for use with copper and stainless steel, these hard-wearing 1/2 in. to 4 in. Standard Copper Tube Size CTS Jaws and Press Rings deliver evenly distributed force for consistent results while maintaining long-lasting durability. A galvanized, black surface coating helps defend against the buildup of rust. The versatile press jaws and rings are manufactured to work with the DEWALT® 20V MAX* Press Tool (DCE200”sold separately) and will work with most professional-grade press fitting brands.