Not sure if part of prime day anymore, but was ~$5 cheaper than prime day sales.
From Amazon's description*:
- Metal drill bits with titanium nitride coating
- Titaniumnitride coating excel through their long service life and high strength
- For fast, clean drilling in the most diverse metals, plexiglass and hard plastics
- blah blah blah
*I stopped reading after a while
Highly rated for:
Kit