Standardized T-shank (also known as EURO shank) for AEG, Atlas Copco, Bosch, DeWalt, Hitachi, Makita, Metabo, Milwaukee, and others. The progressive blade is now produced with a new progressive tooth design. The fine teeth at the tip cut through thin materials, while the coarser teeth are more effective in thicker materials. HSS: High-performance high-speed steel with a long lifespan, suitable for cutting common materials. BiM: Blade made from HSS bi-metal, combining the performance of HSS with the flexibility of carbon steel. These saw blades are shatterproof and can be used universally. 5 jigsaw blades on a retail card for long blade life and quick cuts. The standardized T-shank fits nearly all jigsaws.