Bling?

Don't feel bad if you don't know what these are -- they're step drills. Although I've been messing around with tools for many years, I only recently discovered the point (excuse the pun) of these strange drills. They're designed for drilling holes in sheet metal, and the steps make it easy to choose the desired hole diameter.

Just in case you're wondering, the gold color is a titanium nitride coating, sometimes used for costume jewelry and medical implants.

Here's the completed project I used one of the drills for. You might recognize some of the parts from a previous blip.