Drillco 450T Series High-Speed Steel Jobber Drill Bit, Uncoated (Bright) Finish with TiN Coated Tip, Round Shank, Spiral Flute, 135 Degree Split Point, #4 Size (Pack of 12)

The Drillco 450T series jobber length drill bit is made from high-speed steel with a titanium nitride (TiN) coated tip and has a 135-degree split point for drilling steel, stainless steel, titanium, nickel, and aluminum. The jobber length drill bit has a versatile midrange drilling depth and is a common choice for general-purpose applications. High-speed steel (HSS) provides hardness for wear resistance, and the titanium nitride (TiN) coated tip offers increased hardness for better wear resistance and a longer tool life than an uncoated drill bit. The self-centering 135-degree split point penetrates hard material without a pilot hole and produces smaller chips that reduce clogging compared to a 118-degree point. The round shank accommodates most drill chucks. The drill bit conforms to American National Standards Institute (ANSI) specifications.Drill bits are cutting tools used to make holes in a range of materials using machines such as handheld portable drills, machining centers, and lathes. Drill bits come in a variety of lengths and types, the most common of which is the twist drill bit. The round, twisted shaft of the twist drill bit typically has two cutting edges and flutes. The helical twist of the flutes brings chips up and away from the cutting edges and allows for coolant to reach the cutting edges. Jobber length twist drill bits, the most common length of twist drill bit, offer a good compromise of length and reach for the widest range of materials and applications. Mechanic's length twist drill bits (also called maintenance length) are a little shorter than jobber length and less prone to deflection when drilling. Short length twist drill bits (also called stub or screw-machine length) are the shortest and stiffest twist drill bits, helping to reduce the chance of deflection or breakage when drilling. Reduced shank twist drill bits (also called Silver and Deming drill bits) have a shank that is smaller in diameter than its shaft, permitting drilling machines with a 1/4", 1/2", or 3/4" drill chuck to create large holes. Long length twist drill bits (also called taper length) are a little longer than jobber length, allowing for deeper holes and longer reach. Extra-long length twist drill bits (also called extension) are longer than long length twist drill bits for greater reach or for drilling deeper holes.Drillco manufactures cutting tools such as drill bits, reamers, taps, dies, annular cutters, end mills, and burs. The company, founded in 1978, is headquartered in Baton Rouge, LA.

• Designed for drilling steel, stainless steel, titanium, nickel, and aluminum
• Jobber length drill bit has a midrange drilling depth
• High-speed steel (HSS) provides hardness for wear resistance
• TiN-coated tip is more wear resistant and has a longer tool life than an uncoated drill bit
• Self-centering 135-degree split point penetrates hard material without a pilot hole and produces small chips to reduce clogging