Conveniently available and easily installed replacement parts for your Felco pruners guarantee that your favorite shears are the only ones you'll ever need. Replacement screw (7/7) holds the locking segment in place. Screw may be loosened to turn center bolt and allow locking segment to move when making a tension adjustment of the blades and should be re-tightened when blades are properly adjusted. For use with Felco 7, 8, 9, 10, 13, 50, 51, 811, 811B model pruning shears. Made in Switzerland.