The Halls MC High-Speed Steel Step Drill Bit in the 4mm - 12mm size range is the perfect entry-level variant for detailed metalwork and smaller diameter holes. This compact step drill covers nine consecutive sizes—4, 5, 6, 7, 8, 9, 10, 11, and 12mm—making it ideal for precision work in control panels, electronics enclosures, and thin gauge metal fabrication. With a 6.5mm shank designed for smaller drill chucks, this variant offers exceptional control and accuracy. It's rated for sheet metal up to 5mm thick, the highest material thickness capacity in the range, making it suitable for slightly heavier gauge work despite its smaller hole sizes. The 1mm increments between steps provide finer hole size control compared to larger variants, perfect for applications requiring exact fitment. As with all metal drilling operations, always use a suitable coolant to maintain cutting performance and extend tool life. Features and Benefits: • Nine consecutive sizes from 4mm to 12mm • Maximum material thickness: 5mm (highest in range) • 6.5mm shank for smaller drill chucks • 1mm increments for precise hole sizing • Ideal for detailed and precision metalwork Specifications: Min. Size (mm): 4 Max. Size (mm): 12 No. Steps: 9

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