Features:
These countersink drill bits works great in making a smooth hole.
High-speed steel, high quality with good durability for you to use.
Suitable for bore metal, PVC, wood, plank, aluminium alloy or plastic board.
An essential hardware tool for the DYIer or the professional wood worker.
It
Includes:: 4 sizes in one drill bit set (6, 8, 10, & 12), which meet your different needs perfectly.
Very convenient to change the bits with the included mini hex wrench which loosens & tightens the bits to hold & release as needed.