Redlam Mk2 Break "Glass" Panic Bolt. Designed for interconnecting emergency exit doors. 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 aluminium, Redlam panic bolts are the economical solution to the problem of providing reliable security for internal emergency exits. Features:. 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 aluminium. Designed to produce no sharp edges when smashed. Breaking the CeramtubeTM results in the bolt sliding back automatically and unlocking the door. Designed for interconnecting emergency exit doors that require visible security. Supplied complete with hammer and chain