Ideal For DIY， Home And General Building/Engineering Using Containing sizes: 1mm，1.5mm，2mm，2.5mm，3mm Material: High Speed Steel with Titanium coated Size & QTY:1.0mm : 10pcs1.5mm : 10pcs2.0mm : 10pcs2.5mm : 10pcs3.0mm : 10pcs Quantity: 1 Set (50Pcs) Package includes:50Pc x Drill Bit