Dirlling Diameter Complete specifications from 2.8-4mm drilling diameter.
Spray Treatment This countersink drill bit set adopts spray treatment, and oxidation
High Quality High quality YG8 alloy cutter head with good wear
Suitable For This countersink drill bit set is used for wood, aluminum alloy countersinking, opening.
Convenient for Useing Each drill bit is in their own case for protectionm, it's easy to use and clean.