TENA laminated glass is composed of 2 or more tempered glass sheets & interlayer films. It is very difficult to breakthrough the laminated glass by force because combination of the strong, durable tempered glass & interlayer films can absorb and lessens quickly most of the shocking energy. Even if the outer glass sheet is broken by hard force (eg. a heavy steel hammer), the debris can be kept still by strong adhesion of the interlayer to avoid hurting people or valued articles nearby.