THTEN HT19-401-003-03 Trimmer Replacement Blades Head Compatible with Hyper Tough 40V MAX 13" String Trimmer HT18-401-002-01,HT10-401-002-01,18 Pack HT18-401-004-01 Trimmer Line 6PK Package Includes: 4x spring

Package Includes: 4x spring

our aluminum signs do not rust

Designed with an aerodynamic oval shape to reduce drag

(9 Pack) 138-ft

THTEN HT19-401-003-03 Trimmer Replacement Blades Head Compatible with Hyper Tough 40V MAX 13" String Trimmer HT18-401-002-01,HT10-401-002-01,18 Pack HT18-401-004-01 Trimmer Line 6PK Package Includes: 4x springFit for Hyper Tough 13 in. 40V Cordless String Trimmer HT19 401 003 03 Fit for Hyper Tough 12 in. 4 Amp electric Grass Trimmer HT18 401 002 01 Fit for Hyper Tough 13 in. 4 Amp electric Grass Trimmer HT10 401 002 01 Easy Installation: simply push this trimmer head into the string socket and it automatically locks in place with assistance from the side push buttons. For Best Use: Avoid Using This Accessory for Edging, Working with Brick, Chain, Concrete