Glass 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 for stained glass, diamond and minerals cutting Anti-skid durable metal handle, ergonomics handle design, holding feel comfy, long time use saving labor Glass cutting head is replaceable and can 360-degree rotate, use oil dropper add some kerosene into the glass cutting tool, make the cutting head is more fluent and sharp Round metal knocking head, used for knocking glass after cutting or put it under the scratches of glass and split the glass Read Less