The PullBolt Side Mount model can be mounted either adjacent to the locking frame or parallel to the ground surface. A Keeper Plate is supplied for bolt security (or for added strength). Like all D&D locks, the PullBolt is made from 316-grade stainless steel, making the device ideal for use in marine and other corrosive environments. The 3/4 inch (19mm) diameter lock bolt has a throw of 1-1/4 inch (32mm), and contains a hardened steel insert to resist hack sawing. It is also resistant to prying, oxyacetylene cutting and bolt-cutting. D&D PullBolt has a standard 6-pin key-in-knob style lock cylinder. This cylinder can be keyed alike, maison-keyed, master-keyed, or it can be replaced with high security cylinders such as Abloy, Assa, Kaba, Medeco, Mul-T-Lock or Schlage Primus......to name a few. The locking mechanism is a deadlock design (not snap lock), which protects the lock from being tampered with, and also assures the system cannot be locked without the key-holder’s authority. Can be used for left or right handed mounting. Limited Lifetime Warranty!