LONG-LASTING MATERIAL: Replacement chain made of carbon steel, heat-treated for high hardness, lightweight, and compact structure. Designed for extended durability, efficient cutting, reduced vibration, and clean performance. MEET DAILY NEEDS: Package includes 2 replacement chainsaw chains and a 4-inch guide bar. Suitable for 4-inch chainsaws; allows quick replacement of dull or damaged chains to maintain workflow efficiency. VERSATILE: Compatible with 4-inch chainsaws. Suitable for cutting wood, plywood, laminate flooring, particle board, plastic, ice, and rubber. SHARP TEETH: Features sharp, wear-resistant teeth with chrome-plated cutters for enhanced durability, rust resistance, and consistent cutting performance. EASY REPLACEMENT: Replace by loosening the securing screw, removing the old chain, installing the new chain with the cutting teeth facing forward, and tightening the screw. Ensure proper alignment before use.