[EricH]

Modify a climbing carabiner, large size, by removing the gate or the locking mechanism of the gate (depending on whether you want to lock onto the bar or use the hook elsewhere). I've seen teams lift robots with them before. If they can hold a 200lb human, they should be able to hold a 150lb robot--just make sure you get one rated for that weight.

As an added bonus, they're not going to be terribly expensive.