7-piece step drill and nut drill set designed for percussion drills. - Compatibility and purpose: specifically built to be used with percussion (hammer) drills for a range of drilling tasks. - Key components: includes a nut drill, a step drill, and a spiral cone end drill as essential elements to cover common holemaking needs. - Versatile performance: the step drill allows for precise, progressively sized holes; the nut drill supports efficient hole preparation for hardware; the spiral cone end drill adds an additional drilling option for specific requirements. - Size range and efficiency: a 7-piece set provides multiple diameters to tackle various materials and hole sizes, reducing tool changes and improving productivity. - Reliability for any project: designed to be a convenient, dependable tool set suitable for both DIY projects and professional applications. Use scenarios - Installing hardware on metal or wood surfaces, drilling clean, correctly sized holes for fasteners. - Creating progressively larger holes in thin metal sheets or plastic for mounting brackets and wiring passes. - General drilling tasks in workshops or job sites, supporting DIY repairs, cabinetry work, and light metalworking.