Forgot to mention, if you have a small or low powered trimmer (like
electric) only use two ports of the four available on these products.
Four large diameter trimmer lines can actually overburden a small
trimmer and cause it to crap out and even burn out the motor . . .
believe it or not. Hardly makes sense, but it's a reality.

Sporkman wrote:

Buy a replacement spool of the "fixed-line" variety. Examples are the
Grass Gator "Load & Cut" and the Echo "Rapid-Loader". Both types have
spring-loaded cams or wedges which retract as a short (but thick) piece
of trimmer line is inserted and then grab the line (with tiny teeth) so
that it won't fly out. Both have a number of different threaded nuts
which match about 99% of the trimmer arbors out there. Just make sure
that you CAN take the trimmer head off of your Ryobi. I've got one
electric trimmer (Black and Decker, I think) that had a head that can't
be disassembled from the arbor.

There ARE trimmer head designs that enable one to load a number of yards
of line from the outside by pushing it through the side of the head.
But one such product has a return rate of over 40%, and other such
products are designed poorly to cut effectively. I'm working on one for
the inventor of the "Load & Cut" which will be much easier to load and
be much more effective in cutting. But it'll probably be end-of-year
before the product is on the shelves at Home Depot and WalMart.

Mark 'Sporky' Stapleton
Watermark Design, LLC
http://www.h2omarkdesign.com