|Unbreakable Diamond Tether|
|Invented by||Farnsworth's Grandmother|
|Purpose of invention||To tether things without breaking|
|First appearance||The Deep South|
The Unbreakable Diamond Tether attached the Planet Express ship to the Planet Express building. It is, obviously, unbreakable and can pull an entire building along with the ship. Bender also uses it, along with Amy's umbrella and Hermes' manwich, to go fishing and a giant fish pulls them along and under water. It was possibly made by Farnsworth's Grandmother.