I am getting some of these heads to try out. They are machined from quality knife grade steel and are hardened to RC 58-59. 100% steel construction and 100% made in Boise, ID USA. Specs are 1-1/8 main blade, 1/2" bleeder. Overall length is 1-1/4" They will be available in 100 and 125 and also I will have ferrules ready in July to fit injexions. The main blade is a really high end knife steel, no other manufacture even comes close to this steel. (So I am told) You guys think they will kill an elk?