1、REAL HIGH SPEED STEEL MATERIAL: Made of real high speed steel material, bring sharper opening and more efficient drilling 2、OF SHARPNESS AND WEAR RESISTANT: The drill bit is of sharpness and wear resistant, hardened by quenching, possess of sharpness edge angle, high drilling efficiency 3、CONVENIENT TO ACCESS AND STORE: The pull box has an independent drill slot design, the drill does not run off, convenient and quick to access and store 4、FOR VARIOUS MATERIALS: HSS twist drills can be used for wood, plastic, bodhi, nuclear carving, olive pit and other materials 5、10 DIFFERENT SPECIFICATIONS: This set contain a total of 10pcs HSS drill bit with different specifications, which will meet your using needs Item Type: HSS Drill Bit Set Product Material: High speed steel Product Model: Approx. 0.8mm / 0.03in 1.0mm / 0.04in 1.2mm / 0.05in 1.5mm / 0.06in 1.8mm / 0.07in 2.0mm / 0.08in 2.2mm / 0.09in 2.5mm / 0.1in 2.8mm / 0.11in 3.0mm / 0.12in Uses: Wood, plastic, bodhi, nuclear carving, olive pit 10 x HSS Drill Bit