This kit will convert any caliber Hornady New Dimension sizing die (except 17 and 20) to Hornady's threaded spindle design. Included in the kit is a threaded spindle and a threaded spindle collet. Specifications: - Kit converts any caliber (except 17 and 20) Hornady New Dimension sizing die to Hornady's threaded spindle design. - Kit consists of a threaded spindle and threaded spindle collet. - Remove the non-threaded spindle, collet and expander ball from the existing die, install the threaded spindle and threaded collet, re-use the existing expander ball. - If the spindle on the expander die is already threaded, then this kit is not necessary. - All die sets shipped in 2006 and later are the new threaded style.