Pressmaster mct crimp dies and ratchet crimp tool pressmaster 4300 3150 the crimp die open barrel 4300 3150 has been positioned to give the user good visibility when inserting the connector into the mobile crimp toola 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 together in pairs with a special pin and