You can see the large chromed spring in these clips adding another element of fear for the wearer. The 665 Adjustable Spring Clamps have some weight and heft to them already. However, feel free to attach a weight to the center of the chain and create even more ache. See how much weight you can attach before these bad boys are ripped off, causing a rush of both pain and relief to his aching nipples. The combination of sensations will send an instant rush to both of your boy’s heads.