This Titan Tools 11955 ratcheting heat shrink terminal Crimper is loaded with an A5 die for use with Closed end connectors and heat shrink terminals. The corrosion resistant carbon steel frame and comfort grip handles ensure durability and comfort. The Quick Change jaw design allows for easy die changes. The ratcheting mechanism releases after full compression. This Crimper also has a built in safety that allows the Crimper to be released mid-cycle if necessary. The Crimper features an adjustable compression wheel as well.