He says some of the new material is comparable to their latest released track 'Lords Of Summer' but adds that a lot of the songs are "little bit more progressive" and similar to their last studio album "Death Magnetic" and "remotely similar" to "...And Justice For All," though he warns that it is not sonically like that classic album.

Hammett discussed the new material during an appearance on SiriusXM's Liquid Metal on Tuesday (April 14th). He told the show (via Blabbermouth, "I would say some of the stuff [we have written] is similar to 'Lords Of Summer'. 'Lords Of Summer' is pretty accessible, because I think it's one of the more accessible-sounding riffs and there's a really cool melody. A lot of the other material is a little bit more progressive - kind of along the lines of what 'Death Magnetic' turned out to be."

He elaborated, "I would say that there's some really, really hooky stuff coming through - really, really catchy stuff - and I'm really, really psyched on the direction of how things are sounding.