From the brand Description of product Outstanding features:It makes cutting weeds easier. The harness can reduce shoulder and body fatigue by distributing weight across the entire upper body.Increasing comfort. Adjustable Shoulder Strap: This brush cutter harness is easily adjustable.Professional design is very ergonomic, which is suitable for men and women of different heights. Perfect Replacement: Perfectly replace # 4119 710 7001, on STIHL FS series trimmer, KM series kombi engine .this harness fits most brush cutters as it comes with the machine handle hook. High-quality materials: The brush cutter attachment is made of soft and padded material, the strap is made of tough nylon, durable, strong, flexible and practical. Multiple Uses. : It can be attached to a lawnmower, brush cutter or other heavy duty power tools in the garden.