1.5 to 2 Times Longer Wear Resistance (Compared with normal O-Ring) The X-Ring s four contact points greatly increase its sealing performance. This keeps the dirt out and the lubrication in much better than any other O-Ring. X-Rings have the greatest wear resistance of any other type of O-Ring or Non-O-Ring chain. Half the Power Loss (Compared with normal O-Ring) D.I.D s patented X-Ring® construction reduces friction by twisting between the side plates instead of being squashed. Normal O-Rings and other makers modified O-Rings have squashed points that increase friction. The twisting action of the X-Ring® disperses the pressure and minimizes power loss.