No. Every piece in this collection is designed to protect the surface it sits on, not damage it. The deskpad and mousepad are single slabs of leather with no stitching, no sharp corners, and no hard plastic backing that could scratch a desk. The valet tray rests on its own leather base, no metal feet, no rubber that could mark a wood finish.
Full-grain leather sits heavy on a desk without adhesive and without slipping. If you routinely set wet drinks down, pair the pieces with our leather coasters so moisture never reaches the leather underneath. For long-term care of the desk surface itself, a leather slab is more protective than a bare keyboard and mouse, which can scuff lacquer and oil finishes over years of daily use.