25pcs HSS twist drill bit sets Tin coating or black finish,metal box packing. 25 PCS HSS TWIST DRILL SET SIZE(MM): 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, 10. PACK: Metal box.Surface treatment: Tin coating, black finish,bright. HSS twist drill set 25pcs High speed steel