What role does the anti-slip rubber attached to the surface of the straight-type cutting board holder play?

It is from 40cm to 48cm^[1]. This is the standard sink bowl width where Kajidonya's straight-type cutting board holder can be stably rested^[2]. There are three structural features confirmed in the build of this holder: the usable sink width, the sliding bar fixing method, and the rubber pads attached to the surface.

When installing, adjust the sliding bar according to the inner dimensions of the sink, then tighten the screws to firmly fix the length^[3]. This method ensures that the holder frame latches onto both ends of the sink so the frame does not shake during work. Anti-slip rubber is added to the surface where the cutting board is directly placed^[4]. It provides friction so that the cutting board does not spin loosely outward or slip, even in an environment where moisture is easily exposed.