Shop › CMART A3106 CERAMIC / GLASS DRILLS FOR CERAMIC. GLASS WOOD 12MM/1/2 INCH CMART A3106 CERAMIC / GLASS DRILLS FOR CERAMIC. GLASS WOOD 12MM/1/2 INCH ₱64.00 Unlock precision drilling with the CMART A3106 Ceramic/Glass Drill. Designed for superior performance on ceramic glass and wood this 12mm (1/2 inch) drill bit delivers clean accurate holes every time. Perfect for DIY enthusiasts and professionals alike. Get yours today! Purchase Added! Unlock precision drilling with the CMART A3106 Ceramic/Glass Drill. Designed for superior performance on ceramic glass and wood this 12mm (1/2 inch) drill bit delivers clean accurate holes every time. Perfect for DIY enthusiasts and professionals alike. Get yours today!