The manufacturer's site has no product description for the 11950 ratcheting wire terminal crimping set. The following description comes from their Amazon listing:

• 7-Piece set comes with 1 ratcheting crimper, 6 Interchangeable dies and a convenient storage case
• Quick-change jaw design allows dies to be easily changed out without the use of other tools
• Ratcheting action and full cycle quick release feature for secure, uniform crimps
• Built in safety release allows crimper to release mid-cycle
• Corrosion resistant carbon steel frame with comfort grip handles and adjustable compression wheel
• Same great crimper as Titan Tools 11477 with the added functionality of interchangeable dies for a wider range of applications