The Bosch HC4511 is a 1/2 inch x 11 inch x 16 inch Spline Shank Rotary Hammer Drill Bit. The spline rotary hammer bit is carbide tipped and fit Bosch as well as other spline hammers.
1/2 inch x 11 inch x 16 inch Spline Shank Rotary Hammer Drill Bit
Drilling in concrete & masonry