Size:1mm+1.5mm+2mm+3mm HRC55 4Pcs Square Nose End Mill Size: A.1mm Cutter:4 Flutes,Blade Diameter=1mm,Shank Diameter=4mm,Overall length=50mm, B.1.5mm Cutter:4 Flutes,Blade Diameter=1.5mm,,Shank Diameter=4mm,Overall length=50mm, C.2mm Cutter:4 Flutes,Blade Diameter=2mm,,Shank Diameter=4mm,Overall length=50mm, D.3mm Cutter:4 Flutes,Blade Diameter=3mm,Shank Diameter=4mm,Overall length=50mm, Attention: 1.Solid carbide tools offer long tool life and faster cutting speeds than other substrates,but more brittle.make sure work piece and machine are stable,use quality collet chucks,or shrink fit chucks. 2.Please adjust the speed,feed and cutting depth according to actual cutting conditions. 3.Adapt to several kinds of cooling conditions, for example oil mist,water,oil,air cooling.