Long-lasting bottle cutting blade; cutter is adjustable and fits bottles up to 7 2/3" wide. Blade is capable of tens of thousands of cuts on bottles, jars, etc. Comes with cutter, sandpaper, protective gloves, a separate glass-cutting tool, and simplified instructions. The instructions include a link for on-line video resources. Works by scoring the bottle, and exposing it to alternating hot and cold water, resulting in snapping at the cut. Many creative projects are possible. Thanks for looking!