Features Breaking the CeramtubeTM results in the bolt sliding back automatically and unlocking the door. Green stickers included: 1 x TO OPEN BREAK TUBE and 1 x STRIKE THE KNOB TO OPEN Supplied complete with hammer and chain Designed for interconnecting emergency exit doors Designed to produce no sharp edges when smashed Operates on one side of the door by breaking the CeramtubeTM and on the other side of the door by pushing the knob Manufactured from cast iron aluminium
