Designed for use with a power drill. The unique stepped design lets one drill bit create holes in a range of sizes, reducing the need for multiple bits. Key benefits - Versatile range of hole sizes: a single bit can drill multiple opening sizes with clean edges. - Wide material compatibility: suitable for steel plates, aluminum, copper, photovoltaic panels, and insulation boards. - Deburring and finishing: drills and deburrs in one operation for precise, burr-free holes. - Stable drilling: resists slipping for consistent, controlled performance. 2-3 practical use scenarios - Fabrication of electrical enclosures and control panels: drill mounting holes in steel plates with deburred edges. - Solar and metal frame installations: prepare and deburr holes in aluminum or copper components and photovoltaic panels. - Construction and insulation work: drill clean holes through insulation boards and related materials for fasteners and fixtures. Function, compatibility, size, material, and performance - Compatible with standard drill chucks; designed for easy installation and use with most power drills. - Multi-size capability within a single bit thanks to the stepped design. - Effective on steel, aluminum, copper, PV panels, and insulation boards. - Aids in achieving sharp, burr-free holes with reduced drill slip for better accuracy.