Good Tools Kit:The universal nut fixing kit is a good tool kit for thinner brush cutters. Universal Nut Fixing Kit:The universal mower gearbox blade nut fixing kit is suitable for most six tooth mower mowing heads. Easy to Install:The brushcutter blade is secured to the rotating head using this fixing set. Material:Made of high quality metal material,durable and long service life.For most lawn mower strimmer,brushcutter.