DaiDo No. 3 is designed for internal penetration or external clitoral or anal massage with flowing wave like ribs gratifyingly positioned along the length of its shaft.Fashioned of high grade aluminum alloy, DaiDo No. 3 has a substantial weight and feel for added pleasure not common with other materials and yet, do not have the fatiguing heft of other metals. Designed for gspot and prostate stimulation. Available in two sizes to fulfill your desires.