Hardex Door Knob Wall Protector Plate 3" White Self Adhesive (Pack of 4) ULTIMATE PROTECTION - They protect interior walls from impact damage by shielding contact point of wall and door knob. CONCEAL DAMAGE - They also covers the damages that already occurred. SELF ADHESIVE - They are very easy to install just peel and stick to clean-dry surface no tools needed. PAINTABLE - They are neutral white finish but can be painted to match wall color. TEXTURED FINISH - They are rigid vinyl that measures 3".