Diagraph’s Oneshot Brush Kit offers the same great package, but replaces the 3" (76.2 mm) roller assembly, with a brush. The Oneshot brush assembly twists onto a specially designed ink cartridge–creating an easy-to-use stenciling tool. The ink saturation is controlled by a valve-action pump in the assemblies. The Brush Assembly uses 100% natural bristles set in epoxy to assure long-lasting performance. There’s no messy refill, simply attach a new cartridge when you run out of ink.