Glass cutter is filled with oil, which acts as a lubricant during the cutting process. This feature reduces friction and enables smooth, effortless cutting through glass surfaces., Glass cutter is equipped with a high-quality cutting wheel made from durable materials; specifically designed to create clean, precise scores on glass, allowing for accurate breaking and shaping., Supercraft Glass Cutter is suitable for a variety of glass cutting tasks, including glass art, stained glass, mirror cutting, and general glasswork.