"Glass reinforced plastic" So fiberglass?,(reply>), Someone asked the same question, and Tom's already responded to it  with "I checked with a couple of people whether I could shorten to "fibreglass" and apparently there's some subtle distinction between the two? It'd get called out either way, so I went for being technically correct on it!",(reply>), Fiberglass is made with resin so it's really stronger than a plastic or polymer with glass fiber. Usually power tools are made of a nylon glass fill, compare that strength to a boat hull, and you can see fiberglass is a good bit stronger,(reply>), But it's still fiberglass, and I know what it is. &gt;.&lt;,(reply>), Yes, it is. Some more modern class use carbon composite material. Stronger yet lighter than steel