Regina 136DR/1001 Drive Chain Link (520/530Dr Extra Drag Racing 530Dr X 150) Designed to withstand the severe application of drag racing Features high alloy steel in gold-colored plates (520DR) or natural plates (530DR) and pins and solid bushings and rollers Plates, pins and rollers are shot-peened for improved fatigue resistance Breaking strength of 10,566 lb. and a fatigue limit of 2,135 lb. is sufficient up to Pro Stock level Clip and rivet type link included