Bosch - DXS5062 - 1-1/8 x 29 SDS Max Hollow Hammer Drill Bit, Number of Cutter Heads: 4

Hollow drill bit – connects to a vacuum system to deliver up to 50% time savings versus the conventional drill-blow-brush-blow anchor-installation method Faster drilling – provides up to 25% greater drilling speed thanks to less dust and reduced friction Great durability – one-piece design offers comparable life to Bosch SpeedX® bitsYou may also like Bosch HCFC2041B25 1/4 x 6-1/2-Inch SDS-plus Xtreme Rotary Hammer Bits -25pc.