Bosch 1" x 8" x 13" SDS-Max SpeedXtreme Rotary Hammer Drill Bit is engineered to deliver exceptional performance and durability for drilling in reinforced concrete and hard aggregate. Featuring carbide heads with a unique four-cutter design, these drill bits are built to last, ing five times the lifespan d to competitors. Utilizing 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 jobsite-proven toughness. Bosch stands alone as the only concrete bit manufacturer that produces its own carbide and performs a quality check on every single bit. The four-cutter design provides a 180° cutting diameter and enables power transfer during drilling for maximum efficiency. An active-centering tip helps create rounder holes, while the four 90° side angles form a wide and sharp head, ensuring precise hole driving. Additionally, the four-flute design aggressively removes dust from the work area, allowing for faster drilling and extended bit life. Model Number: 1 608 590 043