Three point carbide bit sharper, faster drilling and long lasting. Double flute, drilling smoother and good chip evacoution. Xtreme plus drill bits are used for drilling into hard materials such as brick and concrete with minimal effort. The SDS part refers to the shank type, which has two sets of grooves that snap into the chuck making it more secure and allowing the bit to slide up and down giving you the hammer action. The tip often made from strong tungsten carbide givingthem extra strength and resistance to extreme load. Product inaccordance with the Germany DIN technology standard.