The items listed in this link are probably the best available for crimping servo terminals in the 20-22ga range. They are ratcheting with stop adjustment and have an integral terminal retainer that sets the terminal wire depth also . It crimps the wire and the insulation in one step . These prices are 25 to 30 percent of the retail price .a great deal . I am not affiliated with the seller or site but very familiar with the crimp pliers.
http://m.ebay.com/sch/i.html?_nkw=GM...qp=gm+15397700