ITEM NAME:58mm Long 60 Degree Center Gage Thread Gauge Lathe Tool D7V4 58mm Long 60 Degree Center Gage Thread Gauge Lathe Tool D7V4 Product Name : Center Angle Gauge; Material : Steel Color : Black;Size : 58 x 20 x 1mm / 2.3" x 0.8" x 0.04" (L*W*H) Measure Angle : 60 Degree Center gauge is used in lathe work for checking the angles when grinding the profiles of singlepoint screw-cutting tool. Net Weight : 10g Package Content : 1 x Center Angle Gauge Note:Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm..Center gauge is used in lathe work for checking the angles when grinding the profiles of singlepoint screw-cutting tool.