You don’t have to spend a fortune to build your own robots. There are plenty of places that sell affordable robot components. Take the SainSmart Humanoid Robotic Arm & Hand for instance: it has 5 degrees of freedom and uses 6 servos to control each finger separately.
More gadgets like this: here
This robotic hand has an aluminum alloy construction. It weighs only 163g. The arm comes unassembled.
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