FivePears two-in-one step drill bit and drill bit milling cutter, 6-piece set, is designed to work with lithium electric drills, hand drills, bench drills and other equipment. Durable and versatile - Wear-resistant, high-performance drill bits that combine a step drill bit and a drill bit milling cutter in one set. Compatibility and usage - Suitable for lithium electric drills, hand drills, bench drills and other equipment. - Note: 12V lithium electric drills have insufficient torque and are not recommended. Use 36V or 48V lithium drills for best results. Construction and performance - High-speed steel core with titanium coating for higher hardness and wear resistance. - 35-degree oblique blade design with sharp, wear-resistant cutting edges. - Special serrated cutting edges can be used to saw horizontally after drilling. - Universal round handle fits a variety of devices. Limitation - This product is not suitable for stainless steel metal. Applications - Drilling and enlarging holes in aluminum and mild steel panels. - Creating stepped holes and passages for wiring in non-stainless metal workpieces. - Deburring and finishing hole edges in metal assemblies.