The Wheeler Squeeze and Pop glass cutters and easy roll multi-use cutters as well as tubular glass cleaning brushes.
Model Number 69012 cutter for 1/4 through 3/4 inch diameter tubular gage glass. Carbon steel construction with coated plastic handles and chain.
Instructions: Wrap the chain around the tube and hook the nearest chain pin in the jaw. Then with a quick twist of the wrist, a slight squeeze of the handle and pop!