The new Performance Threading System from IRWIN HANSON includes taps, dies and drive tools that are easier to use than ever before. The Performance Threading System includes self-aligning taps and dies for the perfect thread, every single time. New, innovative drive tools make set-up a snap. And, it’s all available in handy, modular set configurations, so professionals can choose only what they need. SAE and Metric Taps and Dies are available. Sizes are clearly imprinted on the case for easier replacement and storage. Plus, sets have clear, detachable lids, and they’re only 1-1/2” thick, to easily fit in the smallest drawer in the toolbox.