KH 4 Speeds 300mm Diamond Core Drill MachineDiamond Tile Drill Core M14 Ã 6-120 Mm SENDI EXTREME Tile Hole Saw. The seller is absolutesupplies and is located in Cornwall. Applications Drilling Soft Facing Brick, Drilling Concrete Blocks, Drilling Hard Sandstone, Drilling Coarse Sandstone, Drilling Soft Slate, Drilling Breeze Block, Drilling Lignacite Blocks.