459 Pencil Style Glass CutterGlass cutter which can cut thick glass (up to 12mm thickness). tungsten carbide tool tip facilitates clean accurate cut. Spring action and head rotation for cutting even intricate patterns with ease. After scoring the glass with glass cutter snap the glass or break it along the score with a breaker or plier for clean cut Carbide alloy cutting wheel, high hardness and sharp cutting,more smooth cutting, can cut 5mm 15mm thickness glass, an ideal tool