Drill America 5 Piece High Speed Steel Aircraft Extension Drill Bit Set (1/4 - 1/2" x 6" Long), POU Series

Drill America DWDA/C series high-speed steel drill bit is manufactured to National aerospace standard 907. 135 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.

• Sizes included are 1/4", 5/16", 3/8", 7/17" and 1/2" with overall length of 6"
• High-speed steel tools are good for most general purpose applications, offering a combination of hardness and toughness for wear resistance
• Black oxide treatment adds lubricity and creates small pockets on the surface of the tool that act to hold coolant near the cutting edge
• For general purpose drilling in applications where extra length for reach is required, designed to perform in a broad range of materials in the iron and steel families
• Manufactured to national aerospace standard 907