Which tool is designed with low breakage strengths and is used to aid in wire pulls?

The tool specifically designed with low breakage strengths to aid in wire pulls is pulling tapes. These tapes are lightweight and flexible, which allows them to assist in pulling wires through conduits without significant resistance. Their low breakage strengths ensure that they can be easily fed through tight spaces and are less likely to damage the wire or the conduit during the pulling process.

Poly lines, while useful in various applications, are typically more robust and not specifically designed for wire pulling under low-stress scenarios. Ropes are also stronger and not tailored for tasks that require the delicate balance of strength and flexibility that pulling tapes offer. Mechanical pulling heads are used for connecting pulling equipment to the wires but are not the primary tool used for aiding in the actual wire pull process. Thus, pulling tapes are uniquely suited for this purpose.