The elite Navy SEALs who were killed in a helicopter crash in Afghanistan last month are being memorialized by the company that makes custom knives for the SEALs.

The SEALs have played a crucial role in the Global War on Terror, a campaign triggered by the events of 9/11. It therefore seems appropriate that the fallen SEALs are memorialized through a commemorative Emerson CQC-6 combat knife with ties to the World Trade Center, manufactured by Emerson Knives Inc., which has been making knives for the SEALs for more than thirty years.

The blade for this commemorative knife is cut using steel from the World Trade Center. The knife’s name – CQC-6 – stands for “Close Quarter Combat SEAL Team 6.” It has been a sidearm staple for the Navy SEALs since the 1980s.

Ernest Emerson, founder and CEO of Emerson Knives, shared that the support of the SEALs is the key to the company’s success. To show his gratitude and support for the Navy SEALs and their families, Emerson is auctioning off the commemorative knife, in order to raise money for the families of the SEALs.

Emerson shared: “We built the second blade from steel from the World Trade Center because the reason these guys are in the Afghanistan is because of what happened on September 11th, 2001… The SEALs recognize this [design] as ‘their knife.”

The feature shared that bidding for the Navy SEAL commemorative knife is now at a little over $8,500.