Alvord Polk 179-0 High-Speed Steel Center Reamer
- 110 degree angle countersinks are used when planning for a fastener that will be in soft materials, as the larger head size transmits the pressure over more area than a smaller head
- Center reamers are meant to chamfer an existing hole, allowing for a fasteners head to be flush with the items surface or as an intermediate step leading to another machining operation, such as tapping threads
- Uncoated (bright) tools have no finish or coating. They are a good choice for general purpose applications