glass cutter with tungsten carbide scribing wheel tip: 1,very sharp. 2,handy and ... advantages:1. Carbide wheel is super, blade tip is specially processed, make your cutting line near ... made of copper which is more durable and stainless, becose copper is heavier, could knock off ... the glass easily after cutting..Materials:tip: tungsten carbide scribing wheel tip handlealloy handle the main body metal ...