After 34 years in the construction trade, Steve Kokonis, the creator and president of SK Products developed a one-step pipe hanger system that is now recognized and utilized by some of the major engineering companies in the U.S. The new line of universal pipe hangers ranges from 3/8 inches to 8 inches in size for copper pipe usage and up to 15 inches for steel pipe usage. This line was introduced in 2001. Since then, the line of products has grown and now includes our most recent product, the adjustable sliding wrench.