This Japanese made, high quality set of ten drill bits are great for drilling holes in ironwork, light metals, wood, and resin. The varied drill bit sizes are suitable for most household and industrial applications. Don't risk disappointing breakage or possible resulting injury that may occur with cheap, low quality drill bits, instead use Yoitariki's high quality products.Product specifications:• Body size: Hexagonal shaft diameter 6.35 mm,• Drill bit size: 1.5 / 2.0 / 2.5 / 3.0 / 3.2 / 3.5 / 4.0 / 4.5 / 4.8 / 5.0mm.To use this Yoitariki 10 Hexagon Titanium Coated Drill Bit Set for Metal & Wood 1.5 - 5.0mm, simply insert into you favourite drill, either into a hexagonal shaft adapter or directly into the drill chuck, tighten the chuck and adjust the torque to the desired amount for the material you wish to drill. Once this is done, stabilise  drill vertically and start with a low speed and gradually speed up, while exerting pressure as needed to ensure controlled drilling to the desired depth.Made in China