http://rc-dymond.com/
Try this, been using there pin sets for years with no issues. Have also used pin sets from everyone else. I've made too many of these extensions for there to be a problem with this product. The crimper plyers work great....Very resonably priced, The only problem I've ever encountered with any extension is from pulling on the wire itself to remove or unplug an extension, servo or whatever. These plug and unplug securely as well as any. I have only used 22 ga wire max with these pin sets. 20ga. will go but its tuff to install the pins in its housing...Walt