Both men and women can wear these nipple clamps that come with a chain. The chain and clamps are both made of aluminium and stainless steel. and there is no nickel that went into them. You can use these clamps for extra stimulation during lovemaking or for your own self-stimulation; either way. they spice up your life quite a bit. 

Material: Stainless Steel. Aluminum and Rubber.

Dimensions: 35.5cm

Weight: 2.75 oz.