Cable Matters (20-Pack) Blank Keystone Jack Inserts in White BLANK KEYSTONE JACK INSERT fits a standard opening in a wall plate for keystone jacks STURDY SNAP-IN CONSTRUCTION of blank keystones provides a secure connection to prevent access or tampering into your wall plates RE-USABLE KEYSTONE JACK INSERTS can be easily disconnected and relocated when upgrading or redecorating TIDY INSTALLATION provides a professional looking installation in the home or office COST-EFFECTIVE 20-PACK provides spare inserts for a last minute cabling project