The support mahlstick is needed in cases where the most reliable support for the hand is important. It self-locks on the side edges of the stretcher or board and can withstand a noticeable downward load. The support mahlstick is not as quick to use as the others, but its main advantage is reliable hand support. This is the most powerful option for stable work and long painting sessions. This version can be especially useful for older artists and for those who find it difficult to hold their hand in the air for a long time.
The support mahlstick can be installed at different angles, up to vertical, and used as a guide for the brush. It is possible to draw lines with a brush using it, although it is not as convenient as with the vector mahlstick, because the guide rail is farther from the canvas. Nevertheless, it is possible.
The support mahlstick is very versatile in terms of painting size. Its working span is determined not by the tool itself, but by the length of the selected rail. For a small painting, you can use a short rail; for a large format, a long one, up to 2-3 m (6.6-9.8 feet) in length. The tool is suitable not only for painting, but also for working with graphics and drawing.
The disadvantage of working with this type of mahlstick is that when the tool is moved over fresh paint, some paint may transfer onto the grips and leave marks along the very edge of the canvas. Usually this is the area that is later covered by the frame. If you wipe the contact parts when moving the tool, you can work neatly. On a dry painting, this problem does not occur.
Also, if you press down strongly with your hand, small dents may remain along the edge of the stretcher. The rubber insert included in the set solves this problem.
More about the support mahlstick
here.