Specification Brand : THTEN BulletPoint1 : Compatible with Kobalt replacement pre-wound trimmer line for Kobalt KST - 120X KST2040-06 and 40v Max Cordless String Trimmer.Not compatible with Kobalt 40V Trimmer Head,(Item 1520463,506892,808667) BulletPoint2 : Easy Installation: simply push this trimmer head into the string socket and it automatically locks in place with assistance from the side push buttons. BulletPoint3 : For Best Use: avoid using this accessory for edging, working alongside brick, chain, or wooden fencing.Model:29473 BulletPoint4 : Products Include: The package contains 6 Pack Polycarbonate Blades and 4 Set Screw,1 Pack Trimmer Head,1 Pack Tool wrench. BulletPoint5 : After-Sales Assurance: Pls contact us first when you get some problem, we will offer you assistance asap. BulletPoint6 : Warning! Many replacement parts look the same,but will not fit your model, Check your model number and parts number before buy! BulletPoint7 : 90 Days Warranty protects you after your purchase! Color : blue ExternallyAssignedProductIdentifier : 8710783024309 ExternallyAssignedProductIdentifier1 : 0768461180449 ExternallyAssignedProductIdentifier2 : 768461180449 ItemName : THTEN KST-120X KST2040-06 Trimmer Replacement Blades Head Compatible with Kobalt KST 120x-06 and 40v Cordless String Trimmer 16 Pack (Item 1520463,506892,808667) ItemPackageDimensions_Height : 12.9032 centimeters ItemPackageDimensions_Length : 4.3942 centimeters ItemPackageDimensions_Width : 7.8994 centimeters ItemTypeKeyword : string-trimmer-replacement-parts ItemTypeName : Model:29473 Manufacturer : THTEN Material : Plastic ModelName : kobalt 1520463,506892,808667 ModelNumber : KST-120X blade 1+6+4+1 NumberOfBoxes : 1 PartNumber : KST-120X blade 1+6+4+1 PowerSourceType : manual ProductDescription : THTEN KST-120X KST2040-06 Trimmer Replacement Blades Head Compatible with Kobalt KST 120x-06 and 40v Cordless String Trimmer 16 Pack(Item 1520463,506892,808667) Size : KST-120X blade 1+6+4+1 Style : KST-120X blade 1+6+4+1 KST2040-06 SupplierDeclaredDgHzRegulation : not_applicable SupplierDeclaredHasProductIdentifierExemption : 1