#39 M42 Cobalt Short Drill Bit (12-Piece)

11/64 In. X 12 In. Cobalt Aircraft Extension Drill Bit

9/32 In. X 6 In. Cobalt Aircraft Extension Drill Bit

#8 X 12 In. Cobalt Aircraft Extension Drill Bit

1/4 In. X 12 In. Cobalt Aircraft Extension Drill Bit

Cobalt Aircraft Extension Drill Bit 1/8'' - 12'' Length for Precision Drilling

1/8" x 12" Cobalt Aircraft Extension Drill Bit - High Performance & Durability

1/2 In. X 12 In. High Speed Steel Aircraft Extension Drill Bit