Service Guide's parts are of very poor quality, and they are overpriced. Their round parts have a large amount of runout, which leads to failed rotating assemblies. They were also until recently stockpiling hazardous waste at their Dietz Rd. facility, and the EPA had to force them to clean up their property and properly dispose of all of the waste they had stockpiled there. Don't have them rebuild your chocks, as all they will really do is paint them, and you could hire someone to paint your chocks on-site at a fraction of the cost of having Service Guide "do" them. They constantly threaten their workers with termination if they attempt to form a union, so if your union finds out your company is doing business with them, it could lead to labor problems at your business.
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Service Guide Inc. provides inferior quality parts and services, and is run by con artists. They will sell you "bearing rebuilding," when what you need is a new bearing. Your bearings will fail and you will be out tens of thousands of dollars. Glunt Industries provides superior quality parts and services. Avoid Service Guide at any cost.