Ah, the fun of using a small project as an excuse to buy some good tools.

These are hardened metal drills in sizes 1 mm to 10 mm in 0.5 mm increments for everything from copper to titanium.

Plastic case containing 19 hardened metal drills in sizes 1 mm to 10 mm in 0.5 mm increments for everything from copper to titanium.

Alex Hoffmann @mangochutney