The Sealey AK4701 Cobalt Drill Bit Set is supplied in metal storage case  The Sealey AK4701 is a 19 Piece Set of Drill bits that have been manufactured from high-speed steel with 5% Cobalt which makes them ideal for drilling extra-hard materials. The split-tip enables bits to bite the workpiece quickly reducing the need for the centre mark. Features:   Supplied in metal storage case  Drills can be re-sharpened without affecting their performance  Split tip enables bits to bite workpiece quickly reducing the need for centre mark   Comes with: Drill Bits: 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6, 6.5, 7, 7.5, 8, 8.5, 9, 9.5, 10mm Specification:  Weight: 1kg  Model No: AK4701