DG-66-1 1.Very easy to installating and can be used instead of knob
lock for old door. 2.Latch is up to international standard. Two
choices: 60 mm and 70mm. 3.After the door is being shut off, lock
light spring slice behind the latch and extremely lock the latch
automatically after pigeonholing, so long as it is correct to
install, it is safe and reliable. 4.No longer installs the
electrical machinery into inside the mortise, which facilitated the
maintenance work. 5.Door thickness request is not less than 3.0 cm.
6.Install fast and quietly. There is no effect on the daily
business of hotels. 7.Free rotating handle, maximum prolong
mechanism life and also avoid unlocking by violence. 8.Inserting
card jaws adopts automatically deadlocks the dustproof wall, no
dust or other things can enter in, this technology is in top of the
same profession 9.When install ,no need to reconstruct the door,
just remove the old knob door lock , then you can install one lock
within 5 minutes. www.sunking-digi.com