Union 1465 Rim Sashlock is from the brilliant Union Range. Although this lock can only be locked or unlocked from the one side it is very secure and the latchbolt can be withdrawn by a door knob from either side.

Specifications
The deadbolt can only be locked or unlocked on either side of your wooden door. The latchbolt can be withdrawn using a door knob from either side of your door.
Excellent 3 lever mechanism
Supplied with 2 keys
Case Finished in Black
The handling is Left or right handed
Size of Case : 140mm
Width of Case : 140mm
Height of Case : 70mm
Depth of Case : 19mm
Depth of Lip : 15mm
Backset Follower : 114mm
Backset Keyhole : 51mm
Size of Follower : 8mm