Sun Jifa, a farmer from China’s northern Jilin province, lost both his hands when a fishing explosive went off prematurely in his home nine years ago. Not wanting to lose his main source of income, Sun spent the next eight years crafting his own steel bionic pair from scratch with little direction but his own intuition. Continue reading for a video and more information.

According to Jifa, [the prosthetic] transfers power from the natural movement of [his] elbow into the finger, allowing it to grab and hold. This is the left hand. For the other hand, rotating the two bones that [are] left in this arm allows [his] right hand to open and close like this.”