Gold-Tip Designer II This handheld glass cutter is the perfect tool to score and break out glass for all of your window repair, framing, and decorative pieces. Key Features: - Ergonomic pencil grip handle - Brass ball end - Transparent plastic barrel - Narrow cutting head - 140° tungsten carbide scoring wheel Place the cutter between the first and second finger. Draw the cutter across the glass only once. Do not repeat the cut. Use only enough pressure to make a light score from edge to edge. Apply modest upward pressure on the score and pull apart to run the score and separate the glass into two pieces. Once you are done completing a project with your glass cutter, lightly oil the scoring wheel in order to maintain it and keep the blade in good condition.