Description: BRAND NEW 30 - 60 - 90 & 45 - 45 - 90 Degree Angle Plate. Four holes 11/32" for easy mounting, 9/32" thick. Hardened steel. Precision ground angles. Feature: High performance,reliable quality. We work with every effort to provide quality products and professional service. Specification: Accuracy: 0.0001" per inch +/-20 sec .