Package includes:18 x Twist Drill BitsSpecificationMaterial: HSS 4241Surface treatment: TitaniumFull length: 5-13cm18PC :1.5mm 2mm 2.5mm 3mm 3.5mm 4mm 4.5mm 5mm 5.5mm6mm 6.5mm 7mm 7.5mm 8mm 8.5mm 9mm 9.5mm 10mm