Non-coolant-through high-speed steel jobber-length drill bits do not have coolant holes, so a separate hose is required to bring coolant to the bits' tip if it is needed. High-speed steel drill bits provide more flexibility and absorb more shock and vibration than cobalt, powdered-metal, and carbide drill bits, making them suitable for use in manual drilling machines and handheld power tools. They may leave a rough finish on the hole. Jobber-length drill bits are the most commonly used drill-bit length. They provide a good balance of strength and accuracy when drilling into a range of materials.
This drill bit is made of high speed steel. This jobber length drill bit has a 3½ inch length. Plus it has right hand cutting direction, and a split point drill point.
This drill bit is made of high speed steel. This jobber length drill bit has a 3½ inch length. Plus it has right hand cutting direction, and a split point drill point.
This drill bit is made of cobalt. This extended length bit has a gold finish. It is non-coolant through. Plus it has spiral flutes, a straight shank, and a 118 Degrees split point drill point.
This drill bit is made of cobalt. This extended length bit has a gold finish. It is non-coolant through. Plus it has spiral flutes, a straight shank, and a 118 Degrees split point drill point.
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