LINSEN – expanders can be power driven by electric drill, pneumatic drill. Designed to produce tube end connections without fittings. Enlarges tube end without distortions or buckling and leaving. 0,015” (0,38 mm) clearance that another tube with the same outside diameter can be inserted and soldered. It is excellent for U-tubes, short bends, for copper, brass aluminium and thin steel tubes. Available from 3/8” (9,5 mm) to 2” (50,8 mm). For more details contact factory.