The bosch pro t121 gfc is a bi-metal jigsaw blade designed for cutting thin sheet metal, delivering up to twice the blade life of the bosch t118g. Constructed with a high-speed steel hss tooth strip bonded to a high-carbon steel hcs body, the blade combines flexibility with durability. The tooth strip features an aluminium-titanium-nitride altin coating that resists heat and oxidation during demanding metal cutting applications. The wavy-set, milled tooth geometry works in combination with the blade's tapered body and thin kerf to deliver smooth, straight cutting progress. It is suited to cutting thin sheet metal between 0.5 Mm and 1.5 Mm thick. The t-shank fitting ensures compatibility with all t-shank jigsaws, making it a straightforward upgrade for metalworkers already working with t-shank tooling. Features and benefits: lasts up to 2x longer than the bosch t118g jigsaw blade altin-coated hss tooth strip for improved heat and oxidation resistance bi-metal construction hss tooth strip bonded to hcs body for strength and durability wavy-set milled teeth and tapered body for smooth cutting progress suitable for thin sheet metal between 0.5 Mm and 1.5 Mm thick fits all t-shank jigsaws specifications: compatible material thickness: 0.5 Mm 1.5 Mm shank type: t-shank tooth material: high-speed steel hss with altin coating body material: high-carbon steel hcs