It is great for testing real current consumed by electrical gadgets used in our homes. A clamp meter is like a digital multimeter with a jaw which can clamped around a wire of an operating electrical instrument to measure current.
We were talking about the company we found which has various robotic grips. We found that, one such grip is sold at 20 dollar in one website. The stuff is made possibly by die casting.
Arduino: Motor DC y transistor NPN (control de velocidad) | TechKrowd - YouTube