sissydannieI have worn a CB3000 and also a Holy Trainer, the CB 3000 pinched and was uncomfortable and same with Holy trainer. Since I was looking inescapable long term chastity Mistress and I settled on the Mature Metal Bird Cage, and after several attempts we finally got the perfect fit. It is stainless steel, heavy, inescapable and comfortable. We also ordered with an extra long punishment pin and double base ring. An erection is impossible.