Here is a list of leading national suppliers of hammer drill bits in the United Kingdom:

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Leading National Suppliers of Hammer Drill Bits in the UK

1. Bosch

   • A well-known manufacturer of power tools and accessories, including high-quality drill bits.

2. DeWALT

   • A major player in the power tools industry known for durable and innovative drill bits suitable for various applications.

3. Makita

   • Offers a range of hammer drill bits that are designed for both professional and DIY use.

4. Hitachi (now Metabo HPT)

   • Provides a variety of drill bits, including those specifically designed for hammer drilling.

5. Screwfix

   • A popular retailer that stocks a wide range of hammer drill bits from various brands, catering to both trade and DIY customers.

6. Toolstation

   • Another major supplier that carries a range of drill bits suitable for hammer drills, sourced from various manufacturers.

7. Irwin Tools

   • Known for high-performance drill bits that are effective and durable for hammer drilling tasks.

8. Redashe

   • An established supplier in the UK, known for providing a variety of industrial products including drill bits.

9. A. P. Jones & Co. Ltd.

   • Specializes in tools and accessories for drink and light industry applications, including hammer drill bits.

10. HSS Hire

    • Provides a variety of tools for hire and sale, including hammer drill bits, catering to the construction and DIY markets. ```

This list includes both manufacturers and retailers that supply hammer drill bits across the UK. If you need more in-depth information on any specific company or additional details, feel free to ask!