Samsung SHS-AKT300K RFID Sticky Key for Samsung Door Locks (Black) Works with ALL Samsung digital door locks. The RFID sticky keys, tags, or cards can be programmed to open multiple door locks. One key to rule them all (your Samsung door locks that is). The sticky key is super thin and has a pretty strong adhesive. The most common place to use a sticky key is on the back of a phone. Sticker size (LxHxD) 25mm x 25mm x .5mm or 1" x 1" x .02" [ RF ID ] 13.56MHz ISO14443 A Type Mifare