Bosch Professional · Hss Drill Bits

Bosch PRO Robust Line 6 Piece HSS-Co Drill Bit Set

The Bosch PRO Robust Line 6 Piece HSS-Co Drill Bit Set is a precision-ground twist drill bit set designed for drilling clean, accurate holes in stainless steel and other metals. Manufactured from high-speed steel blended with 5% cobalt (HSS-Co), these bits offer superior heat and wear resistance compared to standard HSS alternatives — making them well suited to demanding metalwork applications where lesser bits would quickly dull. The cobalt content strengthens the cutting edge and helps maintain performance across repeated use, reducing the need for frequent bit changes on site. Each bit features a centring tip that prevents wandering at the point of contact, allowing you to start holes precisely without the need for a centre punch. This is particularly useful for contractors and installers working with stainless steel fixings, fabrications, or sheet metal where accuracy matters. The cylindrical shank is compatible with standard three-jaw drill chucks, so no specialist tooling is required. The set includes six bits covering a practical range of diameters from 2mm to 8mm, packaged in a Robust Line case for organised storage and protection. Features and Benefits: • HSS-Co construction with 5% cobalt for enhanced heat and wear resistance • Centring tip prevents bit wander for accurate hole placement • Ground finish for consistent performance and long service life • Cylindrical shank compatible with standard three-jaw drill chucks • Six-piece set covering diameters from 2mm to 8mm Specifications: Diameters: 2mm, 3mm, 4mm, 5mm, 6mm, 8mm Total lengths: 49mm, 61mm, 75mm, 86mm, 93mm, 117mm Working lengths: 24mm, 33mm, 43mm, 52mm, 57mm, 75mm Set dimensions: 156.5 x 69.5 x 23mm Net weight: 0.175kg Contents: 6-piece Robust Line HSS-Co metal drill bit set Included diameters: 2mm, 3mm, 4mm, 5mm, 6mm, 8mm Included working lengths: 29mm, 33mm, 43mm, 52mm, 57mm, 75mm

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