With up to twice the life of Bosch you can drill through reinforced concrete and withstand rebar strikes with the 5/8" x 21" DEWALT® ELITE SERIES™(tm) SDS MAX drill bit. The complete range of these bits are made in Germany with global materials and are ideal for rebar doweling. The patented unique carbide 4 cutter edge design increases the drill bit durability, while the iron blast technology process strengthens the bit and resists fatigue resulting in extreme durability. The bits are guaranteed