This dotting tools kit suits for almost ALL manlada rock or stone dotting art painting. 12 pens, 18 sizes, from 14mm to 1mm | Graduated diameters: 4mm,5mm,6mm,8mm,10mm,12mm,14mm. 5 stylus ball head diameter under 3 mm. | Every flat head arcrylic pen is precision cut and perfect for dot painting on canvas, stones and many other surfaces. Easy to clean with damp kitchen paper. | Length is all about 15 cm. This kit will meet all your mandala dotting needs. | Got compaint saying the kit is not for rock painting. Please pay attention that it suits for flat surface rocks and when dotting please make the pen 90 degree to the surface.