Engineered to provide robust support for overhead messengered cables, this 12-inch extension is designed for mounting on utility poles using 5/8" diameter machine bolts. Capable of handling vertical loads up to 2000 lbs, it stands out with its ability to accommodate various messenger wire sizes thanks to the grooves in its clamping plates, which can reverse to fit different configurations. Rated for a system voltage of 15kV, the unit comprises durable components, including hot-dip galvanized clamping plates, a pole extension, a hex cap screw, and a split lock washer, all of which meet ASTM Specification A153 for long-lasting performance. Whether you are involved in aerial line construction or maintenance, this extension offers the dependability essential for safely securing cables away from utility poles.