Caterpillar Shoes
The caterpillar shoes stuck to Max's hands.
Seen in Episode #9 "Satan Place"
Kind of device Utility
Organization CONTROL
Used by Maxwell Smart

Pair of shoes with suction cups on the soles.

Used for climbing.

The suction cups stick to "practically anything" - which is not always an advantage.

[Episode #9: "Satan Place".]

The same principle is later used in the form of Suction Gloves [GS95 Episode #3: "Goodbye Ms. Chip"].