How to change the string on your hyper tough Walmart lawn trimmer. Hyper Tough 4.6 Amp Electric 13 inch String Trimmer Auto Feed HT10-401-002-01. Gets 4 1/2 stars out of 5 for it low price and ease of use. Keep your lawn looking sharp and clean with the Hyper Tough 4.6 Amp Electric 13-inch String Trimmer. Itâ s much more cost-effective than gas-powered blowers, and without the mess or the fumes. And because itâ s electric youâ ll have consistent power and not have to worry about recharging batteries. It features an auto feed trimmer line system, so youâ ll always have the right amount of string. And that line has a professional-grade 0.065â gauge so youâ ll get professional results. The 4.6A grass trimmer has a 13" cutting area, making it ideal for small to medium-size yards. The handle is adjustable for added control. The telescopic shaft adjusts to users of all sizes. And the retention system keeps the extension cord out of the way and prevents accidental disconnection. Plus, youâ ll protect your plants with the attached flower guard. Itâ s easy to assemble without the need for tools and is lightweight and comfortable to operate. â ¢ 13" cutting path for small to medium sized yards â ¢ Quick Change spool cartridge compatible with other brands â ¢ Auto-feed trimmer line system â ¢ Precision trimming and edging â ¢ Protect your flowers with the attached flower guard. â ¢ Adjustable D-handle makes trimming in the yard more comfortable â ¢ Lightweight and ergonomic â ¢ Cord retention system prevents accidental power disconnection