Pivotrim X3 Trimmer Head For Pivotrim X3 (Stens 385-897)Pivot rim X3 Trimmer Head Pivot rim X3 Fits Models: Universal Most gas, straight and curved shaft trimmers Specifications: Arbor Size s: M8 x 1.25 LH x 22 mm stamped #1 screw, M10 x 1.25 LH x 21 mm stamped #2 screw, M7 x 1.00 LH x 22 mm stamped #3 screw, M8 x 1.25 RH x 22 mm stamped #4 screw, 5/16"-18 UNC RH x 19 mm stamped #5 screw, M8 x 1.25 LH stamped A nut, M10 x 1.25 LH stamped B nut, M10 x 1.00 LH stamped C nut, 3/8"-24 UNF-2B RH stamped D nut, 5/16"-24 UNF-2B RH stamped E nut, M10 x 1.50 LH stamped F nut, M8 x 1.25 RH stamped J nut Easy Installation Fits 99% of gas powered straight and curved shaft trimmers Less stopping to change lines Prevents broken lines Quick and easy line loading Retail packaging Up to 6 cutting edges Uses .095 Diameter line Packaging Type OEM package