Patent ID: 8418326

Claim:
A metallic one-side tooth, comprising: an interlock convex portion formed on one side of an interlock head portion, an interlock dent portion formed on the other side of the interlock head portion, wherein the interlock dent portion is configured to receive an interlock convex portion of another metallic one-side tooth, and a pair of legs extending in parallel from a rear portion of the interlock head portion, a downward inclined upper inclined plane that extends from a front portion of the interlock head portion to an opening edge of the interlock dent portion and toward an inner portion of the interlock dent portion wherein the front portion of the interlock head portion includes an apical edge, and wherein a portion of an inner circumferential surface of the interlock dent portion is joined to the upper inclined plane at the opening edge of the interlock dent portion.