Because of its placing, this makes shear locks less noticeable without compromising the holding force.
A shear lock consists of two pins and a shear keeper. When locking the door the plate with the shear keeper is drawn to the electromagnet with the pins. The lock bolts fill the holes in the shear keeper which ensures locking.
Shear locks have a few advantages over maglocks. First of all, the drop bolt feature combined with the electromagnetic lock provides an extra level of security as both mechanical and electromagnetic locking mechanisms are involved. Secondly, they are more discrete as compared to maglocks. Another yet advantage of shear locks lies in the fact that they can be mounted on any type of doors including metal or glass doors or those with an 180° opening angle.