Work your way up to advanced anal pleasure. Hard Steel Anal Trainer Kit Black. Ready to take a dive into extreme anal exploration? The Hard Steel Anal Trainer Kit will help your body safely acclimate to major length and girth! Start small and work your way up to large. Hard Steel plugs are made of solid PVC. Each plug is tapered for comfortable insertion and is equipped with a neck to hold it in place and a firm base for anal safety. Lube them up and get ready to train! Phthalate free PVC.