The guitarist passed away in 2013 at the age of 49, and he left behind a collection of rare and customised instruments.

The axes are now being sold off by his estate via an auction on and a portion of the proceeds will be handed to the Wounded Warrior Project, a charity which helps war veterans.

A message posted on the auction website reads, "When Jeff Hanneman of Slayer passed away in May 2013, he left behind thousands of fans... Jeff also left behind a number of his personal instruments, so in conjunction with his estate, ESP is proud to help with the auction sale of some of his most prized instruments. A portion of the proceeds will go to a charitable cause that Jeff strongly supported: the Wounded Warrior Project.

"Each instrument described below is a one-of-a-kind custom guitar that was in Jeff's personal collection, and he is known to have played all of them on various Slayer tours and recordings."