The wheel helps take out the slack so you can tighten the wire down by ratcheting the tool.
The ball nose helps you get into places at an angle, if needed, to tighten the wire.
To help grip the tool better when wearing rubber gloves & protectors.
To make it easier to change the direction of the wrench while wearing rubber gloves & protectors.
We made every part of this wrench with controlled machining to make the tool 100% better not 90% better.
There is a difference in clearances in overhead and underground applications.
We want to make sure that all application in the field are covered to help all linemen.
For overhead, RW-04 (5/16) hex and for underground, RW-12 (5/16) hex with pentagon socket.