Seklema, a double sided multi-mat, holds itself to the engraving table top as well as holding material to itself. No double stick tapes, vacuums, or clamps are necessary. It can easily be removed and reinstalled by placing it in position and gently pressing down. it is made of a 1/16 thick core of plastic similar to flexible engraving stock with a thin special rubber coating on both sides. This mat prevents slippage and sideward movement.