TekMat

TekMat makes cleaning and armourer's mats, and the reason they sell in the numbers they do is the printing. Most of their mats carry a full-size exploded parts diagram of a specific firearm, so the surface you are disassembling on also tells you what the part in your hand is and where it goes back.

Mechanically it is a rubber-backed neoprene mat that stops parts rolling, protects the bench finish and absorbs spilled solvent instead of spreading it. That last property is the practical argument — solvent on a bare table finds its way onto everything else. Mats are printed per model, so buy the diagram matching the gun you actually work on.