DEWALT DWZSTH999 Quickload Dual Line Trimmer Spool Head
Condition notes
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DEWALT DWZSTH999 Quickload Dual Line Trimmer Spool Head
Model Number: DWZSTH999
DEWALT DWZSTH999 Quickload Dual Line Trimmer Spool Head
Frequently Asked Questions
Quick answers to common questions about this product.
The QuickLoad spool head accepts both 0.080 in. and 0.095 in. trimmer line, so you can choose lighter line for grass or heavier line for tough, overgrown vegetation.
How much trimmer line does the QuickLoad head hold?
It loads up to 20 ft. of trimmer line, which you can feed in seconds by twisting the cap — no disassembly required.
Does the DWZSTH999 come with line already installed?
Yes. It ships pre-wound with 0.080 in. aerodynamic trimmer line so it's ready to cut right out of the box.
How do I reload the QuickLoad spool head?
Simply twist the cap and feed the new line through — the QuickLoad design lets you reload without taking the head apart or removing the spool.
Is this a bump-feed trimmer head?
Yes. It features bump-feed technology, so you can advance fresh line on the fly for continuous trimming and edging.
What is a dual line trimmer head?
A dual line head uses two cutting strands instead of one, delivering a cleaner and faster cut across a wider path per rotation.
Will this spool head fit my DEWALT trimmer?
It's designed as a DEWALT QuickLoad replacement head. Always confirm fitment with your specific trimmer model before purchase to ensure correct compatibility.
Can I use the thicker 0.095 in. line for heavy growth?
Yes. The head is rated for both 0.080 in. and 0.095 in. line, so you can step up to 0.095 in. for heavier, tougher vegetation.
Why buy this trimmer head open box or used?
Choosing an open box or used option lets you get the same DEWALT QuickLoad performance at a price below typical retail. Check the selected variant for the exact condition.
What makes the QuickLoad line aerodynamic?
The pre-wound 0.080 in. line has an aerodynamic profile designed for maximum cutting performance and improved durability when powering through heavy-duty growth.


