SDS Carbide Tipped Drill Bits are designed for drilling stone or concrete. Carbide-tipped tools feature cutting edges of carbide for wear resistance and a steel shank for toughness. Premium SDS Drill Bits are auto-weld manufactured on first-class German and Swiss equipment with a Japanese-manufactured carbide-tip. 4-Flute Cross Tip vibrates less and makes rounder holes than standard SDS bits. Wide 4-Flute Cross Tip allows for faster dust removal and reduced heat producing more holes than standard SDS bits. SDS-Plus Shank for use with SDS-Plus drills only.