This large step cone drill bit is designed for general drilling across steel, stainless steel, copper, aluminum and other surfaces. Made from high speed steel with a titanium coating, it reduces friction and heat for longer life and cleaner holes. The fixed hole cutter provides added stability during cutting. - Multi size step cone design: delivers multiple hole diameters along a single bit, enabling quick sizing without multiple tools. - Durable construction: high speed steel core with titanium coating resists wear and high temperatures. - Broad material compatibility: suitable for steel, stainless steel, copper, aluminum, brass, wood and plastic. - Easy to use: fits standard drill chucks for convenient, everyday use. - Practical use scenarios: - Electrical and metal fabrication: drill clean through holes in steel or stainless panels for mounting hardware or wiring. - Sheet metal and enclosure work: create precise holes in aluminum or brass sheets for fittings and outlets. - DIY and hobby projects: cut smooth holes in wood or plastic components for cables, dowels or fasteners.