I have never seen one of these before, I admitted, half embarrassed, half intrigued. Relax and spread your legs wide open, this thing is harmless, he said as he gently cuffed each of my ankles into the soft neoprene restraints. The sleek metal rod separates both of my thighs and prevented them from closing, leaving me trembling in anticipation and open for anything. Unisex. Materials Metal Bar, Neoprene, Plastic Cuffs. Country of origin China.