6.5mm (1/4 Inch) x 100mm Grooved Tip Hard Tile Drillbit - GRT-4-4

3.2mm (1/8 Inch) x 70mm Grooved Tip Hard Tile Drillbit - GRT-2-3 4mm x 80mm Grooved Tip Hard Tile Drillbit - 3942-4-80(GT) 5mm (3/16 Inch) x 90mm Grooved Tip Hard Tile Drillbit - GRT-3-4 6.5mm (1/4 Inch) x 100mm Grooved Tip Hard Tile Drillbit - GRT-4-4 7mm x 110mm Grooved Tip Hard Tile Drillbit - 3942-7-110(GT) 8mm (5/16 Inch) x 150mm Grooved Tip Hard Tile Drillbit - GRT-5-6 10mm x 140mm Grooved Tip Hard Tile Drillbit - 3942-10-140(GT) 12mm (1/2 Inch) x 160mm Grooved Tip Hard Tile Drillbit - GRT-8-6