The Azeri Brothers are from Guba, Azerbaijan. They are coaches at the Hercules Ali Sports Club coach, have had official world records 7 times, and were a finalist in the show Ukraine's Got Talent. 
Azeri Brothers' audition in Episode 1202 consisted of one brother hammering huge nails into wood with first his bare hands and then his forehead. Next, the other brother lay on a bed of nails while a man stood on top of him. Finally, a volunteer from the audience stood on a shovel while the edge dug into a brother's neck. Howie Mandel and Heidi Klum buzzed the act. Although Heidi voted "No", Howie, Mel B, and Simon Cowell voted "Yes", sending the duo to the Judge Cuts.
America's Got Talent 2017 The Azeri Brothers Freak Out Howie & Heidi Full Audition S12E02
Azeri Brothers' Judge Cuts performance in Episode 1208 consisted first of one brother slicing a fruit on the other's chest with an axe. Next, one brother first hammered a nail into a wooden board that the second brother then pulled out with his teeth. Azeri Brothers' performance was not strong enough for the judges to send it to the Quarterfinals, eliminating the group from the competition along with The Godfathers and Tulga.
America's Got Talent 2017 Who Makes It to the Live Shows Judge Cuts Winners Part 2 S12E09