Special Features:

Mounted on swivel base

Properties:

An item consisting of a framework with rollers (exclude flanged) and sheaves so arranged as to provide space between the rollers through which the lines from the sheaves are passed. It is usually used on heavy construction equipment, such as crane-shovels, pile drivers, logging arches and the like, on pontoon barges, the rollers providing extra protection from chafing when oblique pull may occur, and sheaves act as a guide for lines.