【Material Quality】 Call point test key is made of plastic, can one step installation in place, and the size of 2.28inches.【Package Includes】 4 black keys, 4 white keys for call points. High durability and long service life.【Safe Fire Alarm Testing】 Users can perform fire alarm testing without breaking the glass. Allows the user to test the call point, or reset the call point upon activation, provided it has a resettable element.【Fits a Variety of Call Points】 Compatible with KAC, ADT, Apollo, Morely, Chubb, Hochiki, Nittan, Notifier, Protect, System Sensor and Ziton.【Advantage】 Perfect for security guards, maintenance personnel, and those looking after a building or property. Allowing clear identification of the call point key for convenient future use. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.