We offer "Lattice Structure Flexible Fingers" for robotic hand tools. The Lattice Structure Flexible Finger consists of a three-dimensional lattice structure called a Lattice Structure, which provides "softness" for robot hands while maintaining durability. Unlike conventional robotic hands, the flexible part of the hand has a high shape-conforming property and can grasp a variety of objects by simultaneously generating force constraint (grasping) and form constraint (pinching).