They are suitable for jigsaws with U-shafts (universal shafts) of all brands of power tools. The U 101 BF Clean for Hard Wood jigsaw blade provides clean, straight cuts in wood. Its precision ground teeth with tooth-ground construction make clean cuts. It is made of BIM (bimetal), and its fully hardened HSS (high-speed steel) tooth list is attached to a high-elastic HCS (carbon-rich steel) construction, making the blade suitable for cutting hard materials such as hard wood and abrasive woodworking materials. It features a fine progressive tooth height (2.7 mm) and cuts a wide range of wood materials from 3-30 mm thick. U 101 BF BIM, ground bevelled and tooth-ground Hardwood, softwood, GFK/epoxy (3-30 mm), laminated boards/HPL