This Stihl's especially light bar is suited primarily for forestry work with felling and crosscutting and for use in agriculture and construction on high-performance chain saws with long cutting lengths. This guide bar is a lightweight version of the STIHL ROLLOMATIC® ES made of wear-resistant steel. Empty spaces are milled out and welded shut using a special laser technique. This creates a stable hollow frame with a flexible outer and substructure. The design is up to 30% lighter than a ROLLOMATIC® ES guide bar. The reduced amount of weight improves the saw's balance, making it possible for users to work longer at a single stretch, which is especially important when sawing with long guide bars.