All machines used and/or made by the D'ni.
“Old Stone Teeth was one of the four major digging machines used by the D'ni. Though it was used...Old Stone Teeth
“The Burrower was one of the four major pieces of mining equipment used by the D'ni. Along with...The Burrower
“Rock Biter was one of the four major digging machines of the D'ni. It was christened in 6430...Rock Biter