carbidealloy step drill bit — durable, precise cutting for sink and pipe work Key benefits Longlasting performance: Industrialgrade carbide alloy construction holds a sharp edge under heavy use, reducing replacement frequency and downtime. Faster, cleaner holes: Threestage hole expansion + progressive step design improves debris evacuation up to 50% faster than standard core drills, reducing edge chipping on delicate materials. Onetool efficiency: Three stepped diameters (20 mm, 35 mm, 50 mm) let you create multiple hole sizes without changing bits, saving time onsite. Easy to use: Installs on most standard drills and works for both professionals and DIY users, enabling quick, accurate drilling without complex setup or predrilling. What it does Progressive 20 mm → 35 mm → 50 mm steps allow controlled hole enlargement in a single pass. Threestage expansion geometry manages cuttings for smoother finishes and less material damage. Designed for repeated use in demanding conditions where precision and durability matter. Compatibility and performance Material: Industrialgrade carbide alloy for wear resistance and stable cutting precision. Sizes: 20 mm, 35 mm, 50 mm increments on a single step drill bit. Fits most standard drill chucks and is suitable for a wide range of materials without additional predrilling. Practical use scenarios Kitchen and bathroom sink installations: Cut clean, accurate drain and mounting holes without swapping bits. Pipe perforations and plumbing access: Create precise openings for pipe routing and fittings with minimal edge chipping. Field service and maintenance: Fast enlargement of existing holes or creating access points for HVAC, conduit, or fittings where durability and speed matter. Why choose this bit Reduces tool changes and job time with three common hole sizes in one bit. Minimizes material damage and rework thanks to faster debris removal and controlled expansion. Built for professionals and DIYers who need reliable, repeatable results under heavy use. Specifications (concise) Material: Industrialgrade carbide alloy Step diameters: 20 mm, 35 mm, 50 mm Design: Progressive step with threestage hole expansion Compatibility: Fits most standard drills Use safely with appropriate speed, clamping, and protective equipment for results.