The Karver range of furling units has come a long way in the last 10-15 years, with each aspect of the design seeing incremental improvements. Captive pins with quick release mechanisms are almost universal on furling drums and swivels these days and they too have seen considerable development. The quick release mechanisms rely on small springs which can get damaged and require replacement. This blog will outline the evolution of the Karver captive pin systems and help you identify the correct replacement spring kit for your Karver furler.