... .promise quality 2.TiAIN coated improve cutters' life 3.Each end mill is inspected by ZOLLER measuring and inspected machine cnc ... carbide square End Mill1.Size: D1-D20mm, 2Flute-4Flute Helix angle: 35 Upto ... of friction, and improve the tools life much. 4.Each end mill is inspected by Zoller measuring and inspected machine. 5 ...