Research from the J - j - List
Japanese Clover Clamp
A Japanese clover clamp is a variation of nipple clamp that has a
distinct shape.
It is known for its ability to increase tension on the
nipple by pulling on the attached chain.
This type of nipple clamp is
also referred to as a butterfly clamp.
The clamps are often used by
individuals engaging in BDSM play or nipple torture.
A Japanese clover clamp is a flat clamp that is typically about 2" x 4"
in size.
The spring tension holds the clamp on the nipple.
The tension
can be increased by attaching weights to the clamps
or
by pulling on the
chain that connects the two clamps together.
The clamp is generally
only utilized by advanced users
because it provides an extreme amount of
pain to the nipples.
The clamp can also be used as a travel restraint
device in some scenarios.
If the chain is tied to an immovable object or
surface,
the wearer is unable to move without the infliction of a
serious amount of pain to the nipples.
(kinkly.com)
Hard Limit for me