The Makita® Shoulder Strap (125520-4) fits Makita 36V (18V X2) LXT Brushless String Trimmer and Brush Cutter (XRU17 and XRU16 respectively, sold separately) to distribute weight evenly for improved operator comfort. This strap easily adjusts to balance the machine for greater comfort when cutting. It installs quickly and is made of high-quality materials for long life. The 125520-4 is the replacement shoulder strap.