Milwaukee's Carbide drilling bits offers a unique multi-faceted Carbide insert reducing the breakage possibility when drilling through re-bar and mesh. The distinctive chisel shaped tip breaks concrete quickly for faster penetration. The four fluted spiral shaft has improved dust removal resulting in less bending stresses. This kit allows drilling and installation of 3/16 in. and 1/4 in. concrete screws with using a single SDS plus rotary hammer tool. Contains components to install hex washer head or flat head designs.