The T 118 AF Flexible for Metal Jigsaw Blade is breakproof when making straight cuts in metal. Its milled, wavy-set teeth are designed for cutting sheet metal. Made from BIM (bi-metal), the blade's 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 provides both sufficient hardness and the required flexibility to cut perforated sheet metal made of standard-strength steel. It is equipped with a very fine progressive tooth pitch (1.1-1.5 mm) and cuts a variety of thin metal sheets with 1-3 mm thickness. For use with jigsaws with T-Shank clamping systems.