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The crimp dies have tab ends designed to go on the outside of the vise jaws to stabilize the assembly while you apply pressure; this is important for an even and strong crimp. Slowly close the vise and watch as the dies come together. We also learned that you don’t need to run the die in completely--doing so tears the sleeve, which can cause a weak area resulting in spark loss. Putting a squirt of lithium grease or a dab of MSD Spark Guard on the W-side of the crimp tool helps smooth the crimp process.