... Tool shaft is heat treated 6pcs SDS DRILL BIT SET 6/8*110MM,6,8,10*160MM,12 ... **210MM SDS-PLUS ShankHammer Drill Bit Set6pcs SDS DRILL BIT SET6/8*110MM,6,8,10*160MM,12 ... *210MMDrill bit design for faster drilling, longer life and rounder holes ... faster dust extraction, less vibration, less friction and more impact energy to the tipTool shaft is heat treated, annealed and ...