The bigger knife is PD1 steel at 62 Rockwell and the smaller is M4 at 63. Both have tapered tang and G10 handle. https://www.facebook.com/Big-D-Knives-440760489412821/
These pictures are off Donavon's website, couldn't upload mine. The 2nd pic is not my knife but looks similar, the handle is like the one in 1rst pic.