A glass muller is used along with a grinding slab to grind pigment into oil, without a huge amount of effort, in order to make your own oil paint.
Jackson’s short handled glass muller is perfect for grinding standing up. It has a comfortable, rounded top and measures approx. 10-10.5cm diameter and has a height of 8cm. It is made of tempered glass and has a tooth on the bottom edge to make it a suitable tool.