For drilling reinforced concrete, masonry, natural and artificial stone Solid piece carbide tip with four cutting faces to prevent jamming in rebar, which also provides cleaner, more concentric holes and a constant high drilling speed Long helix length with Optimized free space for faster debris removal, with Optimized heat treatment to ensure maximum strength Head Type: Carbide Grit Diameter(Metric): 25mm Working Length(Metric): 410mm Application Material: Concrete