The Twin Twister is a soft jelly double ended dildo with 5 different functions to choose from: vibrate, pulsate, pendulum, surge and escalate. Unlike most double enders this one is slimmer at one end than the other making it ideal for anal penetration. The slimmer end has a maximum diameter of an inch while the thicker end has a maximum diameter of 1.5 inches. The ribbed corkscrew effect ensures greater stimulation. Use either alone or with a partner.