Jobber-length twist drill bit from Irwin's 639 series, made from high-speed steel and coated with titanium nitride to resist heat and friction. The TiN coating extends cutting-edge life up to six times that of an uncoated high-speed steel bit, which makes these worth the money if you drill metal often.

• Diameter: 3/8"
• Titanium nitride (TiN) coating lasts up to six times longer than standard high-speed steel drill bits
• 135-degree split point reduces feed pressure and starts on contact without walking across the work
• Heavy-duty web design provides extreme rigidity when drilling metal
• Shorter cutting lips reduce torque in high tensile strength materials
• High-speed steel construction
• Jobber length with a straight shank that fits standard drill chucks
• Drills metal, wood and plastic
• Manufacturer part: 63924