T-Wrench / 3/4" x 11/16"Pack Size:1Green Meadow TW026, Laser 40632, Laser 47052, NHC 203-4112, Oregon 57-008, Prime Line 7-05657, Quality 320-12141, Tilton TL009, Tilton TL084, Tilton 2304084Dolmar 122, 144; Echo 1001; Stihl 050, 051, 075 (older), 076, TS350, TS510, TS360 and TS760 Size: 19mm x 17mm (3/4" x 11/16")