The SpeedX series of hammer carbide bits for concrete perform up to 20% faster and are 18% more durable than other bits. Due to the centric active tip, holes start precisely and begin quickly as inclined side cutters power into concrete. A shortened head design and enlarged dust-clearing channels allow for better performance as holes deepen. Vacuum optimized brazing and heat treatment of the precision carbide tip offers resistance to impact and thermal stresses. Bosch Power Tools & Accessories. 877-267-2499.