Without going custom and expensive, i can't find a metal cage with a small enough gap. I have small balls prone to escape. An currently wearing a plastic cage with a 3mm spacer and 44mm ring so zero chance of a slip.
Poll has closed. The overwhelming majority (86%) prefer “the cold, hard sensation” of metal! Me: Steelheart by Steelworxx; Jail Bird by Mature Metal
It’s all down to personal preference, I have worn both types of device but prefer plastic as my skin reacted to the metal device.
Poll was already closed.. But I prefer metal! Less skin irritation (for me) and easier to clean. I had ball burn with each of the (five!) plastic devices I have had. I have one plastic kink3D for travel - passing security but for any other it’s metal for me. also the looks I like better.
We picked stell due to a lot of the reviews on this site, seems plastic ones are less comfortable and cannot be adjusted or modified as much as metal. But that's just my observation