Tungsten Carbide Scriber for metal, glass, wood, plastics & ceramic
Carbide Scribe/Cleave Pen | MAE Networks UK Ltd
Tungsten Carbide Tip Replacement for Scribe Marking Etching Scriber Pen General | eBay
JURA Ceramic Scribe & Carbide Pick
KINBOM 2pcs Tungsten Carbide Scriber, Carbide Scriber Pen with Magnet Scribe Tool with Extra 12 Replacement Red Hat Marking Tip for Glass/Metal Sheet : Amazon.co.uk: DIY & Tools