A chain puller is a tool used to hold two ends of a chain together while the __________.

A chain puller is specifically designed to hold two ends of a chain together while the master link is being installed. This is crucial because the master link is what allows for the assembly and disassembly of the chain without needing to break it. The chain puller provides the necessary tension, ensuring that the links are aligned correctly so the master link can fit snugly and securely into place.

When using a chain puller, the emphasis is on creating stability and tension which helps in the proper fitting of the master link. Without a reliable tool to keep the ends together, it would be challenging to insert the master link securely, which could lead to potential failures during operation. Thus, the function of a chain puller in this scenario is to assist in achieving a reliable and safe connection in the chain system.