Product details PDF Print SKU: C-R400 Add to Compare Back to: Corbin/Russwin ×Close Corbin/Russwin Since 1839, Corbin Russwin has been a leader in high-quality commercial grade hardware targeted at commercial and institutional facilities. http://www.corbinrusswin.com/en/site/corbin-russwin/ Description 400 SeriesFeatures: Single Acting Handed Sized Spring (3-4) Hold Open or Non Hold Open How to Identify: The Model 400 series spring size will be identifiable by the number stamped on the case.