Y-START Tactical Survival Combat Defence Folding Pocket Knife for Outdoor Survival Hiking Camping Hunting 4 Color Introduced a new single deft knife open, in order to ensure high performance blades, wire cutting edge to take a material, is expected to open to avoid mold steel rigid impact Blades with the highest national standards of forged steel 9Cr18MoV, vacuum heat treatment, hardness assurance between HRC59-60 High hardness, also has good toughness, edge retention is very good On both sides of the blade with the tube shaft bearing, this bearing contact surface is larger than the ball, prolonged use will not press out a recess in the steel, to ensure the stability of the blade Blade material: 9Cr18MoV