Two Hole Straining Plates - Free Postage
The two-hole straining plate increases efficiency at every running post and corner in your fence-line. It serves two main functions: (1) to allows the wire to be quickly strained at running posts & corners without tying a knot and (2) to preserve 100% of the wire strength. No knot means no weakness in the wire, and it works on both plain and barbed wire. In over 5 years of use there hasn't been a single wire slip.
Simply attach and tighten it over the wire with two tek screws (14 gauge, 3/8 drive x 25mm) and you have a solid grip on the wire. Avoid over-tightening your tek screws.
Note: These are designed to replace knots along the line, where there are multiple running strainer posts. They don't replace your normal termination knot at both far ends of the fence.