| Function | The hook bolt hooks onto the door frame, automatically engaging during the sliding process, and is suitable for translational (sliding) opening and closing. | Deadbolt in center, operated by key or knob to extend/retract for locking. Fixed guide lugs align lock body with strike when door closes, preventing latch misalignment and improving door stability. | 85mm,92mm5-ply laminated steel deadbolt with hardened roller pin. Maximum security. Uses standard mortise key or thumbturn cylinders. | 8-ply laminated steel hook bolt with hardened roller pin in case-hardened center ply. Maximum security for gates and high-risk areas. |