HSS Spring Drill Bit for Metals, Woods & Plastics, 21mm

Our 21mm HSS hole saw cutter is engineered for precision drilling of 1/2” BSP male thread holes—ideal for water butt fittings—and effortlessly cuts through metal alloys, wood and plastic.

Manufactured from high-speed steel, this cutter offers exceptional heat resistance and durability for consistent performance in demanding applications. The sharp, evenly spaced teeth ensure smooth cutting with minimal effort, delivering clean, accurate holes without damaging surrounding material.

Designed for stability and reduced vibration, the robust bit attaches easily to standard power drills. Whether you’re installing plumbing, crafting bespoke projects or undertaking general repairs, this versatile cutter provides reliable results every time.

Key Features

• 21mm Diameter – precision drilling for a perfect fit
• HSS Construction – superior heat resistance and longevity
• Sharp, Evenly Spaced Teeth – smooth, effortless cutting
• Suitable for 1/2” BSP Male Thread Holes – perfect for water butt installations
• Multi-Material Capability – cuts metal alloys, wood and plastic
• Ergonomic Design – stable, low-vibration operation