ITEM NAME:3/4'' & 1/2'' 13mmx19mm Chain Saw Bar T-Wrench Spanner Tool for Chainsaw LJAU 3/4'' & 1/2'' 13mmx19mm Chain Saw Bar T-Wrench Spanner Tool for Chainsaw LJAU a.imagelink a:hover.imagelink {color:#60000;.Wrench Shape: combination wrench. 1X chain saw wrench. Screwdriver head: "一" type. Dismantle most brush cutters and saws spark plugs. Sleeve: Wall thickness1.2mm. Head 13mm Length: approx. Model: 13 19mm.