Flush mount door contact

[Jimmy3]

Can anyone recommend a reliable flush mount door contact suitable for mounting in my front door which is wooden?
I'm not sure if they come in different sizes but if so the smaller the better so as not to weaken the frame.

 

[Alarm]

They make a special 20mm one that is quite good.

 

[joe-90]

19 mm is standard. Besides, you only drill to take the body. The frame won't be weakened.

 

[Jimmy3]

Thanks Joe.

 

[Alarm]

19 mm is standard. Besides, you only drill to take the body. The frame won't be weakened.

And what diameter hole do you drill for it?

20mm perhaps?

Or you could get some really small 9.5 mm ones

http://www.elmdene.co.uk/grade-1-and-2-magnetic-contacts.html