Reducing bushings are used to reduce the trade size of a tapered entry. Key factors for reducing bushings are alignment, consistent centerlines, strong threads. Since it is a solid construction the weight and strength of the fitting should be considered. Due to its low brinnel hardness ratings, die-cast has been known to deform under stress load and the softness of the threads will loosen over time. Precision machined cut threads, Alloy Steel hard makes this a self-aligning bushing with rigid conduit. You are guaranteed AMFICO Integrity of USA materials and manufacturing, quality is never a concern.