Creator's Bottle Neck Cutter Black DIY Machine Includes Abrasive Stone CBNC-USA Finally a device to quickly and easily turn old, empty glass bottles into Great Bottle Art, Guitar Slides, Drinking Glasses, Cool Vases, and even Shot Glasses. Simply set the stabilizing plug in the bottle opening, adjust the height of the score by turning the large knob in or out, place firmly on top of bottle, squeze sides, and rotate bottle 360 degrees just one time. Able to cut tapered and straight bottles up to a depth of approximately four-and-a-half inches. Color: Black, INCLUDES Brass Insert for Greater Precision, Model CBNCHEAD USA Carbide Cutting Wheel. Abrasive Stone, Polycarbobate (Lexan) Body For Flexibility and Strength. 100 Percent Made In The USA , the Creators Bottle Neck Cutter gives you a Precision Score each and every time.