Chris Hemsworth Marvel Thor: Ragnarok (2017) Battle Hammer approximately 3.3 x 6 x 12 inches Autographed in-person Nerf item signed in-person by Chris Hemsworth. Marvel Thor: Ragnarok themed collectible hammer replica styled Nerf piece. Chris Hemsworth is also known for his performances in Avengers: Infinity War (2018) and Avengers: Endgame (2019), two major Marvel Cinematic Universe entries that showcase his continued role as Thor across the franchise. This item is certified authentic by James Spence Authentication, Inc. (JSA) Certification number – T68121