Classic oars were made out of wood, but nowadays almost all oars are made of some synthetic material, the most common being glassfiber. Since the use of synthetic materials the weight of an oar has come down from over 7 kilo's, to less than 2.5 kilo's. Commonly the large oars used in coxed and coxless pairs and fours as well as eights are called oars. The smallers ones used in the single, double and quadrupple sculls are called sculls.
The most often used brands of oars are Empacher, Dreissigacker and Croker.