1、Contains a large screwdriver for adjusting the saw blade and a T27 star wrench for all bolts of most saws 2、Come with 4mm hex key for all other saw bolts, very practical and convenient to use 3、There is small screwdriver for adjusting fuel and sawing machine oil, very versatile 4、Comes with 13mm, 16mm, 17mm and 19mm sockets, a variety of specifications can meet your different needs 5、This is a rebar groove cleaner, a round file measuring tool, used for chain saw replacement and maintenance 1 x Chainsaw Multi-Tool Item Type: Chainsaw Multi-ToolMaterial: Cold rolled steelPurpose: Chain saw replacement and maintenanceSocket Specification: Approx. 13mm / 0.5in16mm / 0.6in17mm / 0.7in19mm / 0.7inHex Wrench Specification: Approx. 4mm / 0.2in