Diamond Drill Bits, 10 PCS Hollow Core Drill Bit Set for Ceramic, Glass, Porcelain Tile Diamond Hole Saw Tile Set Glass Drill Bit, 6 mm to 30 mm : Amazon.co.uk: DIY & Tools
Vitrex 10277000V Diamond Tile Drill Bit 6mm with Water Case | Wickes.co.uk
Armeg Diamond Core Drill Bit - 6mm
Diamond drill bit gold, 6 mm M14 | KARL DAHM
Spearhead Drill Bit Glass & Tile Non Slip 6mm - Leyland SDM