What tool is necessary for the proper maintenance of gaffs?

The tool necessary for the proper maintenance of gaffs is a gaff gauge. This specialized tool is designed specifically to measure the sharpness and proper profile of the gaff points, ensuring they meet safety standards and are effective for climbing. Regular maintenance using a gaff gauge allows linemen to inspect for wear, damage, or deformities that could compromise safety.

Other tools like calipers can measure dimensions but are not designed with the specific intent to evaluate gaff sharpness or adherence to safety standards. A wrench is typically used for tightening or loosening bolts and does not apply to gaff maintenance. A measuring tape might be used for various measurements on structures but is also not relevant to checking the condition of gaffs. Therefore, the gaff gauge is essential for maintaining the functionality and safety of climbing equipment for outside linemen.