Amazon.com: Sabre Tools 1-1/4 Inch x 18 Inch SDS Plus Rotary Hammer Drill Bit, Carbide Tipped for Brick, Stone, and Concrete (1-1/4" x 16" x 18") : Tools & Home Improvement
KnKut 1/4" x 4" Carbide Tipped Hard Steel Drill Bit
Extreme-Performance 1/4" Drill Bit for CNC Routers, 1/4" Shank – IDC Woodcraft
STRONGARM CARBIDE DRILL BIT - 1/4" X 12" - MBA USA, Inc.
Set of 2 Extreme-Performance 1/4 Drill Bits for CNC Routers, 1/4 Shank – IDC Woodcraft