The STIHL genuine replacement blade set, part number 42137106050, is specifically designed for optimal cutting performance and durability on STIHL HS 81 R, HS 81 RC, HS 81 T, HS 81 TC, HS 86 R, and HS 86 T hedge trimmers. Manufactured to STIHL's rigorous quality standards, this blade set ensures a perfect fit, restores peak cutting efficiency, and provides clean, accurate cuts for maintaining hedges and shrubs. It is an essential OEM component for maintaining the longevity and performance of your STIHL hedge trimmer.