The Plugin makes it super easy to insert your own butt plug. If you want to functionally increase each arms length by about 8 inches, then the Plugin is for you because it gives you a straighter shot without twisting your body. The Plugin fits almost any butt plug that you already own, as long as it has the normal safety feature of a slimmer neck and bigger diameter flat base. It fits all the plugs in this picture. There is a lot to learn and enjoy the about intricacies of the awesome sphincter muscle. The quickest way to learn and the easiest way to enjoy is with two handed precision insertion. The Plugin is $45 plus shipping.