{ "contact_points": [ { "id": [0, 1, 2, 3, 4, 5, 6, 7], "description": "On the handle of the screwdriver", "usage": "Used for grasping the screwdriver from any side." } ], "functional_points": [ { "id": 0, "description": "At the center of the screwdriver tip", "usage": "Used to indicate where the screwdriver will make contact with screws." } ] }