Wrench-A-Part Used Auto Parts: Large Selection, Low Prices, & Clean Professional Atmosphere. We at Wrench-A-Part strive to provide the absolute lowest prices and largest selection on used auto parts in the area, while providing a clean professional atmosphere. We have implemented key elements to the process that should make finding the used auto part you need as simple as possible, while providing the necessary equipment-free of charge-to help you locate and acquire the used auto part you need.