Available Wire Range (inches): 0.142-0.157
The FASTLINK and FASTVISE can fasten H-T wires without a tool. Merely insert the wires into the holes. The wires are gripped by spring-loaded clamps which tighten more securely as the wires are pulled harder, holding the wires at over 80% of the breaking strength of the wire itself.
The fastlink is double sided for joining two ends of wire on in-line splices whereas the Wirevise is half of a Wirelink and is used for terminations at an end post. Each wire on a fence requires one Wirevise.

To use the fastvise, drill a 3/8 inch hole through the end post and pull the wire through the hole. Then put the Wirevise on the wire and tap it lightly into the hole. If final tensioning is to be done with the FASTVISE, it is recommended to pull the wire to the end post with a chain grab, then push the slack through the hole and Wirevise. A special tightening tool (TVT) is also available for use with the Wirevise. It grabs the wire which has been threaded into the FASTVISE and a simple prying action pulls the wire through the Wirevise to the desired tension.
A TWR wire release tool can be used to remove most 12.5 gauge FASTLINK from the fence wire. This allows the FASTLINK to be reused if care is taken during both initial installation and later removal.