As a 20 year stamper, scenic card builder and constant ink blender, this little tool FINALLY solves all the problems in ink blending. The domed shape is brilliant. The single most common problem in ink blending is harsh edges, and without an edge, well, you get the picture. Get absolute flawless blending, color transition and the ability to swap out whatever color or type of ink you are using. Applicators fit on other company handles too - truly a must have. Made my life much easier.