Suitable for drilling holes in concrete, blocks, mortar, stone, deck plates + concrete. The 3-blade blade construction further improves performance. Improved rebar performance and positioning performance. Penetrates deck plates. The holes are close to a real circle. Uses a 3-point screw shape suitable for the power and speed of the charging hammer drill. This is a pack of 5 Delta Axis Types. Processing Material: Concrete, blocks, mortar, masonry. Blade diameter: 0.1 inches (3.5 mm); Effective length: 2.0 inches (50 mm); Total length: 4.6 inches (116 mm); Shank diameter: SDSplus; Pack of 5 Delta axes; Compatible models: Lightweight hammer drill; Blade: Carbide chip