What Kind of Gears Would One Be Enombed With?

What kind of technology would it make sense to go to the grave with? A crossbow seems like the sort of thing you might bring with you. There have been observations before of animals having appendages that certainly look like toothed gears. The wheel bug is a predatory assassin bug that preys on all kinds of insects, in aphids, caterpillars, beetles and bees.