Irwin Masonry Drill Bit 4.0 x 75 x Cyl Diamond Sharpened Chromium Vanadium Steel

Super acute diamond sharpened hard metal for speedier boring. Patented design of a turn for quicker removal of dust, which allows avoiding drill seizing. Professional treatment of the drill surface, additional protection against wearing. Particularly durable chromium-vanadium steel with increased amount of carboniferous, harder tempering, more enduring drill. Patented vacuum brazing of hard alloy plate at 1100 C assures effective work even under severe conditions. Heavy-duty plastic packing and trade stands for comfortable trading.