30 count, Gripple Wire Joiner is for the fast joining and tensioning of wire fencing. This wire joiner is designed for 13.5g-10g plain wire, trellis wire, field fence, or electric fence or 15.5g high-tensile barbed wire, and reduces installation time by eliminating the need for tying and knotting wires. Created for high loads and corrosion resistance, this Gripple wire joiner is adjustable for re-tensioning year-after-year.