This Jones Stephens J40369 is a sturdy copper swedge tool that features a heat-treated carbon steel construction designed for long-term use. It is used for copper tubes with the following sizes: 5/8", 7/8", and 1-1/8". You can also use this tool on aluminum, soft copper, or any other tubing with thin walls. Jones Stephens takes pride in providing their customers with quality products that are dependable and applicable for all of those who use them. These replacement parts and accessories are developed to both perform and to last the way that they are intended to. In partnership with Jones Stephens, PlumbersStock aims to provide sound solutions to any residential or commercial plumbing needs.