[Cobalt drill bits Widely applicable] Cobalt drill bits for by are suitable for stainless steel, carbon, steel, cast iron, engineering steel, hard metals, copper, aluminum soft metals wood suitable for home handicraft scenes and professional work. [Hexagonal drill shank] The 1/4 universal hexagonal drill shank can be quickly installed and removed. [Good Performance] 13 5% Spiral Double Edge Cutting Corners Do Not Linger on the , but Advance in a Predetermined Direction. [Metric drill bits set] 1.5mm 2mm 2.5mm 3mm 3.2mm 3.5mm 4mm 4.5mm 4.8mm 5mm 5.5mm 6mm 6.5mm A total of 13 drills of different diameters, suitable for home handicraft scenes and professional work Small sizes require attention to speed and temperature. [Dimensional identification strips] Each storage bit is clearly dimensionally identified Easy to store and access. Colour:As Shown Material:Metal Package Contents: 1 * Metric Drill bits Set Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.