Jeremywell Dry Diamond Drill Core Bit for Brick and Concrete with Pilot Bit - 4" (102mm) Diameter with SDS Plus Arbor for #30/40 Diamond, Laser Welded

High diamond concentration for excellent footage and drilling speed. Dry Drilling Applications: Drilling Soft Facing Brick, Concrete Blocks, Hard Sandstone, Coarse Sandstone, Soft Slate, Breeze Block & Drilling Lignacite Blocks. NOT FOR USE ON REBAR For use on hand held core drills and core drill stand Laser Welded - #30/40 diamond grit segment design allows fast drilling with a longer life Dry Drill Bit with Pilot Connection 1/2"BSP threaded attachment