The STIHL 11277929100 Hand Guard is a genuine OEM replacement part designed to provide essential protection for the operator's hand during chainsaw operation. This durable hand guard is compatible with various STIHL chainsaw models, including the MS 029, MS 039, MS 290, MS 310, and MS 390. It helps prevent accidental contact with the moving chain and debris, contributing to safer working conditions. Made from robust materials, this hand guard ensures long-lasting performance and a precise fit for easy installation.