OARS & SCULLS Concept 2 - Dreissigacker Racing Oars & Sculls Through a buying agreement with Concept 2, we are able to offer a limited selection of Dreissigacker sculls to our customers when purchasing a boat. For the best advice and service when purchasing oars and sculls we recommend dealing directly with Concept 2. Follow this link to view specifications for these products - Concept 2 - Dreissigacker Racing Oars & Sculls. Dreher Sculls Through a special buying agreement between the Maas Boat Company and the Durham Boat Company, we are able to offer both fixed and adjustable length Dreher Sculls with Macon, LBB2000 (Hatchet), Apex, and Apex R (Lollipop) blades. Follow this link to view specifications for these products - Dreher Sculls.