I've chewed this job brush horsehair for the care somewhat coarser men's shoes. The brush is solid and has a diameter of 4 cm. Initially the brush has lost a few hairs, then no more. Basically the brush is intended to apply shoe polish on the shoe, but not, for example in the notch between the sole and the shoe. For this hack there own, narrower and probably stiffer brush. The bristles of this brush are rather soft, so you only with difficulty comes in this hack into it. The softness of the bristles also cause they stick a little. Overall, I like the brush but still and I forgive this 4 stars.