CNBTR Universal Oscillating Carbide Grit Rasp Saw Blade Multifunction Tools Set of 5 Very versatile, suitable for most of the tools Lasting performance,great replacement for your old and damaged saw baldes Versatile accessory, use on cement, plaster, thin-set mortar and wood,Adaptation in Bosch and Fein of the vast number of high-quality machines at home and abroad Safety instructions: Razor blades permanently enclosed in a cartridge or housing with less than 2mm of blade exposed. The bladed product is not use for people under 18 years. The item is only use for industrial cutting/engraving, not hazardous article.