From its early beginning in the late 1800's to the modern facility it is today, SPI/Mobile pulley Works Inc, diversification has been key to growth and success all of these years. It began as an entrepreneur's dream to leave England and start a new life in the American South. When his new venture in the citrus industry fell short of the stable success he desired, Mr. William Edgar arrived in the industrial Mobile and established a foundry.

Mobile Pulley and Machine Works hit an all-time low at the beginning of the millennium and was forced into bankruptcy. The facility closed for the first time in 110 years. In 2003 a local company serving the dredging industry, Steel Processors purchased Mobile Pulley. Steel Processors was founded in 1982 by Billy Prine, a former machinist at Mobile Pulley. Soon after the purchase both facilities were combined and began operating at the Mobile Pulley facility.