This side release lock suits many bags and briefcases. It is available in brass (and as CXLK002 in antique brass). The male section is fixed onto the flap of your bag with two malleable spikes. The female section is also secured via two malleable spikes which fold down and clench this section to the main panel of the bag. The dimensions are as follows:

Width of male section:37mm
Length of male section:9mm
Width of female section: 43mm
Length of female section: 19mm