Angle plates provide a convenient and practical means of clamping and holding work in a vertical position. Our high-quality black granite angle plates are MADE IN CHINA and provide the strongest, most durable and stable surfaces available. Excellent finish and flatness make them very compatible for use with granite surface plate accuracy. They are available with either 2 or 4 finished faces. The 2- face has the bottom and adjacent square face finished flat and square to one another. The 4-face is similar to the 2 face, but also has adjacent sides finished flat, square, and parallel. The laboratory grade is 0.003mm per 1 sq m and the inspection grade is .000050" per 6". Sizes are available from 400x 400 x 400 to 2000 x 2000 x 2000mm.