13Pc Twist Drill Set

BOSCH HS1911 - Chisel Point SDS-Max 1 Inch X 12 Inch is use with SDS-max demolition and rotary hammers in concrete.

BOSCH HS1915 - SDS-Max Tile Chisel Self Sharpen 2 Inch X 11-1/2 Inch is used for scraping such as removing tile from a concrete floor and fits SDS-MAX hammer drills and large Hilti hammer drills with round shank.