Fast Cuts - The T 121 AF Speed for Metal Jigsaw Blade delivers fast straight cuts in metal. Its patented back-taper body and thin kerf design provide unrivalled cutting speed. Additionally, a patented tooth geometry and a combination of aggressive and robust teeth further increase cutting speeds. The blade’s milled, wavy-set teeth are designed for cutting metal sheet. Made from BIM (bi-metal), its fully hardened HSS (high-speed steel) tooth strip is bonded with its highly elastic HCS (high carbon steel) body, which reduces the risk of breakage and makes the blade breakproof. Furthermore, it provides both sufficient hardness and the required flexibility to cut perforated metal sheets made of standard-strength steel. It is equipped with a very fine tooth pitch (1.2 mm) and cuts thin metal sheets with 1-3 mm thickness. For use with jigsaws with T-Shank clamping systems. Fits all T-shank jigsaws. Features and Benefits • Fast Cuts in Perforated Sheet Metal • T 121 AF Speed for Metal Jigsaw