This is what we bought in the Big City. The impact toy is a leather strap (I included the measuring tape to give it scale.) Below the strap is a set of nipple clamps. (Click on the photo for a larger view)
As for the strap, well no surprise here, it HURT too. A LOT. Especially when someone beats you with it really fast--whack-whack-whack-whack-whack. It left my butt really red, and it left a few marks and welts. Master said my butt was 'blushing', which just sounds so sweet...but 'being on fire' and 'blushing' are NOT the same thing.
Master named the new toy "Mr. Blister." I hate Mr. Blister already.
But Master loves His new implements of pain, which is what's most important. These are His Christmas presents, after all.