A nice security system for paintings are the "Secure-T" hangers. They
are composed of two sturdy wall mount hangers for the top and a T shaped
bolt at the bottom. The bolt meshes either with the channel in the back
of a metal frame extrusion, or with a metal receiver screwed to the back
of a wooden frame. Once the bolt and receiver mesh, a special tool is
used to turn the bolt 90 degrees, thus locking the system together. It
is a discreet and pretty secure, barring brute force as in the Serrano
example. They should be available through most commercial frame
supplies, and are in the University Products Catalog (1-800-762-1165).

Jamie Hascall
Mountmaker
Hascall Museum Services
3052 15th Ave. W.
Seattle, WA 98119