Bosch 3/4" x 16" x 21" SDS-Max SpeedXtreme Rotary Hammer Drill Bit is engineered to deliver exceptional durability and performance for drilling in reinforced concrete and hard aggregate. Featuring carbide heads with a four-cutter design, these bits toughness and longevity, lasting up to five times longer than competing products. Bosch utilizes proprietary diffusion-bonding technology to bond carbide and steel at a molecular level, creating a solid-state weld that ensures jobsite-proven reliability. As the only concrete bit manufacturer to produce its own carbide, Bosch s quality control on every single bit. The four-cutter design provides a 180° cutting diameter and transfers of the power during drilling for efficient performance. The active-centering tip produces rounder holes, while the four 90° side angles create a wide, sharp head that maintains precision. Additionally, the four-flute design aggressively removes dust from the work area, enabling faster drilling and extending the bit’s lifespan. Model Number: Bosch 3/4" x 16" x 21" SDS-Max SpeedXtreme Rotary Hammer Drill Bit