With the Dewalt DT9559-QZ Extreme 2 SDS-Plus hammer drill bit, you drill deep through-holes in concrete, stone, and masonry with complete ease. Thanks to its 1000 mm total length and 950 mm working length, you no longer need to drill thick walls from both sides. The robust carbide tip with 2 cutting edges powers efficiently through tough materials while delivering long service life. In addition, the optimized flute design clears debris quickly to prevent clogging. This allows you to work faster, cleaner, and with total confidence on every deep drilling job.