
...that repurposes DIAMOND drill bits.
The Big Bang Theory Season 8, Episode 23

He gave her a pair of DIAMOND
earrings and leased her a car.
The Big Bang Theory Season 5, Episode 4

"Where are the DIAMOND bits?" It's normal
to blame any mistake on the other.
Money Heist Season 3, Episode 6

with this punk-ass DIAMOND saw.
The Big Bang Theory Season 12, Episode 14

Gaiman, and Diamond.
The Big Bang Theory Season 11, Episode 16