These are quality, inexpensive and heavy-duty constructed standoffs used for mounting indoor or outdoor signs, display panels, counter-tops, decorative screens, frames and furniture structural elements. These standoff supports have a tamper proof security feature — a locking set screw on the base of the spacer that provides an excellent way to secure the front caps, therefore locking the panel in place. The security locking standoff supports provide fast, safe and easy installation just like our regular through standoffs. They are made of solid brass or stainless steel for durability and are offered in satin chrome or brushed stainless steel finish as standard.