Tecomec Chainsaw high quality T-Wrench 3/4" (19mm) for spark plugs and 1/2" (13mm) for bar nuts.
This wrench works on chain saw models like the Echo models 100, 452, 500, 601, 605, 650, 701, 750, 801, 802, CS60 and more.
The barrel length is 3-3/16" and the shaft length is 5-7/8"