Vintage Steel CUTTER CUTTING TOOL for GLASS BOTTLES, Recycle Display Curios

Description

For scoring glass bottles. When scored and then quickly heated and cooled by turns as directed, they will crack on the score-line. After their edges are smoothed on crocus cloth or sandpaper, they have a variety of uses (ornaments, mobiles, napkin rings, candle holders, flower vases, knickknacks, and so forth). Adjustable for bottles of different sizes. Complete with original instructions.
About 7-1/8" x 5" x 2-1/4". Weighs 11 oz. In good condition, with tiny scratches overall and some surface rust.