Pressmaster mct crimp dies and ratchet crimp tool pressmaster 4300 3129 buy crimp die red and blue pre insulated 4300 3129 from pressmaster ideally positioned to give the user good visibility when inserting the connector into the mobile crimp tool a gentle squeeze on the handles holds the connector and keeps it in position when inserting the wirethe crimping is completed by pressing the handles together until the ratchet is releasedthe easily interchangeable crimp dies are held togethe