1Features: The glass tubing cutter is used to scribe the circumference of glass tubes. It cuts borosilicate and flint glass, creating very clean cracks. 2Cautions: Glass tube pipe cutter does not completely cut glass tubes. Simply scribe the glass tube, alternating hot and cold showers, and the glass tube breaks. If it wears out, it needs to be replaced so as not to affect the use. 3Fine Crafted: Glass tube pipe cutter by the combination of the upper and lower clamps, slick cut, no angular thorns, the glass tube can be scribed, simple operation, easy to use. 4Premium Material: Glass tubing cutter is made of premium zinc alloy material, durable, not easy to break, long service life. 5Application: Glass tubing cutter can be used for teaching or personal use. Please be careful not to cut yourself when using it. You can use gloves or other measures to guard yourself. 2 x GlassTubingCutter Item Type:GlassTubingCutterMaterial: Zinc AlloySize: Approx. 6.4x 6.4x 1.9cm / 2.5x 2.5x 0.7in Use: For Glass Tube Surface Scribing, Produce a Very Clean Crack