The Structures Gripper can be powered by a stepper or servo motor. Elastic bands line the arms to add gripping friction. The Structures Gripper is utilized in the Robot Car kit.
ME-7025 Structure Gripper
www.pasco.com/products/lab-apparatus/structures/motorized-structures/me-7025
ME-7029 Robot Car
www.pasco.com/products/lab-apparatus/structures/motorized-structures/me-7029