ITEM NAME:Metal Scale Ruler Aluminum Angle Plate Arc Scale Ruler Milling Machine Scale img *{margin:0;padding:0;.Milling machine part angle plate is made of high quality aluminum material, tough, hard, wear resistant, robust and durable, owning long using life span. 1 Piece Angle Plate Scale Ruler. The angle plate is compact and lightweight, convenient to carry out, not occupying much storage space.