Copper tube expander tool CT-100AL: 1. for soft copper, aluminum, soft steel tubes 2. for 3/8" - 1-5/8" O.D. 3 ... to 42mm.Easy to operate, safe and depandable.Quality guaranteed.CT-100AL(for inch): 3/8", 1/2", 5/8", 3/4 ... /8", 1-1/2", 1-5/8" O.D. Tubing.CT-100ML(for metric): 10, 12, 16, 19, 22, 25, 28, 32 ...