Bosch 5/8" 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 drill bits toughness and longevity, providing five times the life d to competitors. Crafted using Bosch’s proprietary diffusion-bonding technology, the carbide and steel are fused at a molecular level through a precise high-heat, high-pressure solid-state welding process, ensuring every bit is jobsite-proven and reliable. Bosch stands out as the only concrete bit manufacturer that produces its own carbide and conducts a quality check on each bit. The bit’s four-cutter design a 180° cutting diameter and ensures power transfer during drilling. Its active-centering tip creates rounder holes, while the four 90° side angles form a wide and sharp head for precise hole driving. Additionally, the four-flute design efficiently removes dust from the work area, enabling faster drilling and extending bit life. Model Number: 2608580156