Spartan Tool manufactures all of its drain cleaning cable using a proprietary type of wire that we call SparShine. This wire is among the highest grade wire available from North American wire mills. The "shine" of SparShine comes from a chemical process that impregnates zinc and other elements directly into the wire. It is not a mere coating and will not scratch or wear off over time. What SparShine delivers is a drain cable that will not rust. SparShine will not succumb to the oxidation process that accompanies all other manufacturer's drain snakes. Thus, it will never fail due to rust, which eventually happens to even the most careful operator's cable from our competitor's. SparShine's unique manufacturing process also renders it resistant to acids and bases -- a normal drain cable will crystallize within a few days to a week of exposure to acids and bases. This crystallization will cause quick failure of the cable the next time it is strongly torqued into a clog, either by shearing or kinking that cable. But SparShine resists this process, dramatically extending the life of your cable.