Sizes:1---10mm.Drill Set 1.Precision ground high speed steel.2.Titanium coating extends life up to 4 times longer than other drill bits.3.Sizes:1,1.5,2,2.5,3,3.5,4,4.5,5,5.5,6,6.5,7,7.5,8,8.5,9,9.5,10mm.Drill Set 19 piece High Speed Steel Titanium Coated Drill Set