pLACKMOND ppJacobs chuck drill bits in the diameters listed are nominal size of 532 in and 316 in and are used with 316 in and 14 in concrete screws as a matched tolerance system Meets ANSI standards Due to its aggressive design, the fast and durable carbide tip allows easy centering and spot drilling The dynamic, chisel shaped drill bit head rapidly penetrates the material, simultaneously channeling the drilling dust into the multiflute spiral The geometry of the core reinforcement ensures that the impact energy of the rotary hammer will be transferred with a high efficiency directly from the power tool to the drill bit tip This generates a fast drilling progress The 2fluted geometry of the drill bit provides a fast removal of the drilling dustp