Image: Guardian

After losing an arm in Afghanistan, Private Jaco van Gass, 25, helped design a prosthetic ice pick which he’ll use to climb Mount Everest next month, Gizmodo reports.

Van Gass had the idea to attach a pick to a false arm after he traveled to the North Pole last year with Walking with the Wounded, a U.K. charity that helps rehabilitate soldiers injured in the field. He asked engineers at a rehab center in Britain to help him design the axe.

The ice axe includes an electrical system, made of two heat patches connected to a battery pack sewn into his clothing, to keep his stump warm.

In addition to losing his arm, van Gass also suffered a collapsed lung, punctured organs, loss of muscle on his upper left thigh, shrapnel wounds and fractures on his leg.