Wide Application- this kit could be used on Normal areas and narrow areas, 5 different exchangeable pad 3R 6R 10R 13R 17R, 9 different sizes of the shape.for home, kitchen, bathroom, tank, window, sink joint, and so on. Good Quailty and Design- Made in Taiwan and also acquire many countries patent, such as Europe,U.S.A,Taiwan,Japan,China, etc. Save your money - Caulk saver can save the unused silicone and not harden it. Easy to use- Behind a stove, a tap, side of a window. Due to the unique design of the kit this is no problem.