X3 Trimmer Head Pivotrim X3 Packaging type: OEM package Packaging type OEM packageArbor Sizes: 2 Nuts: 3/8-24, Nut: 5/16-24, Nut: 7/16-24, 2 Nuts: M8 x 1.25, Nut: M10 x 1.0, Nut: M10 x 1.25, Nut: M10 x 1.5, Nut: M12 x 1.5, Nut: M12 x 1.75, Bolt: 5/16-18, 2 Bolts: M8 x 1.25 and BoltEasy InstallationQuick and easy line loadingPrevents broken linesLess stopping to change linesUp to 6 cutting edgesFits 99% of gas powered straight and curved shaft trimmersUses .095 diameter lineRetail packaging Use with 380-689 Fire Trimmer Line 380-689 Fire Trimmer Line, Use with 380-682 Fire Trimmer Line 380-682 Fire Trimmer Line, Use with 380-686 Fire Trimmer Line 380-686 Fire Trimmer Line FITS MODELS Universal most gas, straight and curved shaft trimmers