3/4" Irwin 12" Straight (With 1/2" Shank) Carbide Tipped Masonry Drill Bit, Carbide Tipped For Maximum Wear Resistance & Capacity To Withstand High Impact, Patented Flute Geometry For Faster Chip Removal, 12" Length For Deep Drilling Requirements, For Us With Rotary & Percussion Drills, Shot-Peened, Double-Tempered Finish For Extra Durability.