It is most useful for checking tool angle while cutting threads in metal turning lathes. The angles on the thread cutting tool is checked on the in . Typically used to check the thread size determination is correct. Feature - Color: As shown - Material: metal - Size: 6.5 x 1 x 0.7cm - The thread Pitch Gauge used to measure the pitch of the thread and provide the correct size drill bit,or to size fastener to determine what bit should to use. - Made of Heavy duty gauge steel.Reliable quality to ensure accurate measurement data. - Center Gage use to grind and position thread cutting tool on a lathe. - The leaves are individually stamped with accurately formed thread profiles. - Metric (mm) 60°: 6.0/5.5/5.0/4.5/4.0/3.5/3.0/2.5/2.0/1.75/1.5/1.25/1.0/0.9/0.8/0.75/0.7/0.6/0.5/0.45/0.4 Package list: 2 x thread gauge