This is probably the best product for cutting normal to small size bottles. As you can see, it is about 9 inches from bottle bottom to cutting point. Please make sure the blade can touch the bottle before you cut the bottle. Super Easy and Convenient to Use: Check the detailed description below. The bottle cutter features a sharp blade to cut perfect score line. In 5 easy STEPS you can make your own artwork. Cutting Length : From bottle bottom to cutting point:2" to 8.3",the cutting diameter of round glass bottles or mason jars:0.5" to 2". Provide you cut both from the top or the bottom of the glass bottles and mason jars. Suitable with most of beer/wine/drinking glass round bottles (Vodka, Tapered, Champagne, Captain Morgan, Perrier, Pellegrino, Patron, Growler, Grand Marnier, Firestone... Smoothly Cutting: The results will amaze you,clean breaks nearly every time. Each blade is made of sharp and hard metallic steel. Even thick champagne bottles break easily and smoothly. Please use it carefully your first time, the thin glass can break easily. HOW TO USE Step One: Position the Bottle Decide where you want to cut the bottle by loosening the screw and moving the backstop forward for a shorter cut and backwards for a longer cut. Step Two: Scoring The Bottle This is exactly the same as making a score line when glass cutting. - Rotate the bottle towards you with two hands (see photo). - Keep it firmly against the backstop and keep it moving while you’re making the score line. - This will take practice if you've never used a cutter to cut glass before. Only go round on Step Three: Heating the Score line Heating the score over boiled water and cold water alternately bathe three times or more than Step Four: Separating the Bottle Step Five: Smoothing the Edges