The Segal Double Cylinder Deadlock is a trusted surface‑mounted security solution designed for homeowners who want dependable protection against forced entry. Constructed from solid high‑strength bronze alloy and finished in a corrosion‑resistant brushed finish, this lock delivers long‑lasting durability with a classic appearance. Its time‑tested jimmy‑proof design helps prevent intruders from forcing entry by wedging or spreading the door frame, a common break‑in method. Featuring a strong cross‑bolt locking mechanism, this deadlock adds resistance against prying and physical attack at the door edge. Designed for use on wood, metal and resin doors and frames, the surface‑mounted installation allows for easy alignment and straightforward DIY installation using the included hardware. Each lock set comes complete with two keys and a flat keeper used for outswinging doors, providing everything needed for a secure and reliable door locking solution.