PARTSMART SMR430030 Wheel Chock, 7.75" x 9.5" x 5.63" Nyracord&#174; Symar&#174; Pyramid style wheel chocks are engineered for maximum hold to provide you with the confidence of knowing that your load is secure because your trailer will not roll while parked. These wheel chocks feature an extra-large eye bolt for added security and ease of handling. Made in North America Nyracord&#174; Symar&#174; Pyramid style wheel chocks are durable and reliable and out-perform lower grade crumb rubber chocks. Constructed from compression molded, fiber-reinforced vulcanized rubber, these high quality wheel chocks will not corrode or crack, even in the most severe weather conditions. PARTSMART wheel chocks are "Real World" tested with excellent durability and a long life cycle.