B+D files: Making professional and DIY use easier. Features: Used on deburring, removing material from inner surfaces of cylindrical projects or to cut half-round grooves, ideal for wood, metal, plastic, professional and frequent diy use. With ergonomic design, anti-slip and comfortable grip handle, better control when handling hard-to-hardness and high frequency quenching, ensuring longevity and strength. Cut quickly and smoothly since the files cut on both the push and pull strokes. Multipurpose professional and DIY tools. Warrnty does not cover products that are improperly used, abused, altered or repaired, nor does it cover consumable good such as knife blades, screwdriver bits, etc.