Drill America - D/AA/CX61/4P12 1/4" x 6" High Speed Steel Aircraft Extension Drill Bit (Pack of 12), D/AA Series

About this product

Drill America D/AA/C series High-Speed Steel premium quality drill bit is manufactured to National Aerospace Standard 907. 135 degrees split point is self-centering and reduces thrust. Ideal for drilling in mild steels where extra length for reach is required. They have a black oxide surface treatment that is abrasion resistant, reduces chip welding and improves chip flow.