Unique ultra thin magnetic catch design with extra strong magnetic force. Max. temperature: 176 degrees F (80 degrees C)Screw heads should not protrude above the base plateScrews not included, use M3 flat head or equivalentWARNING: This product can expose you to nickel, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, go to www.P65WARNINGs.ca.gov.