Parker's Low Drag D-Rings are designed to provide lower frictional drag force than commonly used loose seals of the same width. Tests performed on actual parts show Parker's Low Drag D-Rings offer between 30% and 70% re¬duction in drag versus commonly used molded seals. With bidirectional sealing capability, machined Low Drag D-Rings with relief can be used in a wide range of ap¬plications. The rectangular base of our Low Drag D-Rings offers stability as the piston or rod oscillates, preventing seal rolling and the leaks or seal failures commonly associated with a rolled or twisted seal. Machined Low Drag D-Rings also eliminate the potential for leakage which can appear at molded seal parting lines in dynamic applications. Machined Low Drag D-Rings frequently provide a cost advantage com¬pared with traditional seals. Due to the unique manufacturing process, larger Low Drag D-Rings can be produced at a lower cost than comparable molded seals. Assemblies that use elastomer-sealed pistons can benefit from Low Drag D-Rings. Low Drag D-Rings can be used in automotive and heavy-duty pow¬ertrains, as well as any reciprocating or sliding application where low-drag seal¬ing is important.