Step Drill for Spring Plunger Bolts

the step drill made prep for installing the screen latches very fast and easy.

Great idea but it didn't work very well. I chucked the bit in my drill press. The first step was no problem. But the second step was very dull. It would not drill through the aluminum frame. I ended up using the step drill to mark the holes but used a regular drill to finish the holes.

Drill worked great