Capacity ：1/8~1 3/4"(3-42mm) in various models. Compact design for tough use. Suitable for cutting copper tubes, thin-walled stainless steel tubes, thin-walled steel, aluminum, brass tubes. Sturdy telescopic spindle, long spindle guidance and 4 specially hardened back pressure rollers ensure exact alignment to the tube, easy in-feed, easy-cutting and precise, right-angle cut. Ergonomic, handy operating knob in metal for easy work and long service life. Cutter wheel protected against touching the back pressure rollers by in-feed limitation. Retractable internal reamer, pivoted for automatic alignment to the work piece.