The name says it all: the RIDGID Model 118 Close Quarters Tubing Cutter is specifically designed for use in restricted spaces on 1/4 (6.35 mm) to 1-1/8"-inch (28.57 mm) diameter hard or soft copper, aluminum, brass or plastic tubing. Designed with an AUTOFEED® cutter wheel that automatically cuts after tightening the knob only once.