CK Tools 597389 Masonry Drill Bit 4x75mm - CK Tools T3110A 07100, Masonry Drill Bit 7x100mm - CK Tools T3110A 07100 is a specialized masonry drill bit designed for efficient drilling into hard materials such as brick, concrete, and masonry. CK Tools T3110A 07100 Masonry Drill Bit 7x100mm