While you wait for answers, we may have found some information which could help you.
Click here for Spool Electric GrassSpring for Prop Shaft in a 250W Grass Trimmer?
Replacement Spool Cover Challenge Extreme Grass Trimmer Product?
spare part for challenge extreme?
Where can I obtain a charger for a Challenge Xtreme 18volt cordless trimmer?
Blade guard?
where can i purchase a spool & line complete ?