This 4mm Irwin HSS Long Pro Drill Bit is a workshop staple, perfectly sized for a broad range of general drilling applications. Ideal for installing fixings, mounting equipment and fabrication work, this popular size delivers reliable performance across low carbon steel, soft metals, wood and plastics. Manufactured from high quality HSS steel with a bright finish, this drill bit features precision ground cutting edges that enable fast drilling whilst ensuring perfect finishing. The ground flute
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