Dewalt 1608 5/16-Inch x 12-Inch Extra Long Black Oxide HSS Twist Drill Bit

The Dewalt 1608 is an extra-long 5/16-inch diameter twist drill bit designed for deep drilling applications where standard length bits fall short. Measuring 12 inches in total length, this high-speed steel (HSS) bit provides the extended reach needed for drilling through thick materials, long-distance boring, and hard-to-access locations.

Key Features:

• Black oxide coating reduces friction and resists corrosion for extended bit life
• High-speed steel construction maintains sharp cutting edges even under heavy use
• 135-degree split point tip starts on contact to prevent walking and reduce pressure needed
• Extra-long 12-inch length reaches deep into materials and tight spaces
• 5/16-inch diameter suitable for medium-sized holes in wood, metal, and plastic
• Straight shank fits standard drill chucks

Ideal for construction, metalworking, and industrial applications requiring extended drilling depth. The black oxide finish helps dissipate heat during drilling while providing rust resistance for long-term storage.