American Lock ASK8 Rekey Kit, Pinning Kit for American Padlock

Great kit. I recommend

Has just about everything you need to service American locks. This kit doesn't come with spool pins, there are a couple serrated spools in the included replacement cores. It does come with plenty of serrated top pins though. Also be prepared, the replacement cores have springs and top pins loaded, shipping may shift the cores causing them to bind or spill top pins.