The Bosch PRO 18 Piece HSS-Co Drill Bit Set is a professional-grade metal drill bit set designed specifically for drilling in stainless steel and other hard metals. Manufactured from premium high-speed steel blended with 5% cobalt (HSS-Co), these bits offer exceptional resistance to heat and wear — essential qualities when working with tough materials such as stainless steel. The cobalt content reinforces the steel, helping the bits maintain their cutting edge through demanding applications and repeated use. Each bit features a precision-ground centring tip that allows you to start holes exactly where needed, reducing wander and improving accuracy. This makes the set well suited to construction workers, installers, and contractors who require consistent, clean results across a range of hole sizes. The set covers 18 pieces ranging from 1mm to 10mm in diameter, conforming to DIN 338 with a 135° point angle. All bits have a cylindrical shank compatible with standard three-jaw drill chucks, and the set is supplied in a compact Toughbox case for easy storage and transport on site. Features and Benefits: • HSS-Co construction with 5% cobalt for enhanced heat and wear resistance • Precision-ground centring tip for accurate hole starts and reduced wander • 18-piece set covering 1mm to 10mm diameter range • DIN 338 standard with 135° point angle • Cylindrical shank compatible with standard three-jaw drill chucks • Supplied in a Toughbox case for organised, on-site storage Specifications: Diameter range: 1mm – 10mm Included diameters (mm): 1; 1.5; 2; 2; 2.5; 3; 3; 3.5; 4; 4; 4.5; 5; 5.5; 6; 7; 8; 9; 10 Working lengths (mm): 12; 18; 24; 24; 30; 33; 33; 39; 43; 43; 47; 52; 57; 57; 69; 75; 81; 87 Total lengths (mm): 34; 40; 49; 49; 57; 61; 61; 70; 75; 75; 80; 86; 93; 93; 109; 117; 125; 133 Net weight: 0.428kg Case dimensions: 180 x 85 x 45mm Contents: 18-piece Toughbox metal drill bit set, HSS-Co, DIN 338, 135° point angle Included diameters (mm): 1; 1.5; 2; 2; 2.5; 3; 3; 3.5; 4; 4; 4.5; 5; 5.5; 6; 7; 8; 9; 10 Included working lengths (mm): 12; 18; 24; 24; 30; 33; 33; 39; 43; 43; 47; 52; 57; 57; 69; 75; 81; 87
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