http://www.micromark.com/Cross-Locki...ign=GoogleBase
i use these. i got them at a hobby store years ago. before i start i set pin in tweezers so they are ready on the bench, then i work on a punti and when piece is finished I super heat where im plunging pin into and barely heat metal pin a bit, stick pin in , hold my breath while it sets so i dont move, remove punti and place in hot kiln.