Great tool! but no longer uses the Lee priming tool shell holders. They have changed the heads to only fit Sinclair shell holders. So if you have an older tool and want to buy additional heads they will only fit the Sinclair holders which is a pain having to have yet another supply of shell holders handy. Especially if you load a lot of different calibers.
Awesome tool - looks like it would cost taking a guess around $84.00? $134.00 tops. Close? Not sure you need to lock every squeeze my vintage hand prime tool of similar design does not lock and presents no problem with the case inserted properly.