T-Wrench 19mm x 13mm with T-27 Torx Bit.
Fits Stihl Chainsaws
19mm x 13mm (3/4" x 1/2")
3" Barrel with a 7-3/4" long handle.
Replaces
Stihl 4128 890 3400, 4224 890 3400.
Dolmar 940 827 000