Features 1、Stainless Steel Blades: All 52 blades are made of stainless steel, which is not easy to rust, ensuring the accuracy of measurement. 2、Application: The center gauge is used to grind and position thread cutting tools on a lathe, and is usually used to check the thread size to determine whether it is correct. 3、Tool Angle Can be Checked: When cutting threads on a metal lathe, the tool angle can be checked to confirm the angle of the thread cutting tool of the V trough of the instrument. 4、Basic Specifications: There are 24 blades in metric, and the pitch of each blade is 0.25‑6mm. There are 28pcs in imperial, and each piece is represented by the number of teeth per inch from 4‑62 teeth. 5、Special Measuring Tool: Pitch gauge is a special measuring tool that stacks multiples of the pitch, and is used to check the thread pitch. Specification Item Type: Thread Pitch Cutting Gauge Material: Stainless Steel Purpose: Used to Check the Thread Size to Determine Whether is Correct Colour: Silver Number of Blades: 52 Neutral Gauge Angle: 55°, 60° Blade Description: There are 24pcs in metric, according to the pitch of each piece, the pitch is 0.25-6mm. The number of pitches is: 0.25/0.3/0.35/0.4/0.45/0.5/0.6/0.7/0.75/0.8/0.9/1.0/1.25/1.5/1.75/2.0/2.5/3.0/2.5/3. 3.5/4.0/4.5/5.0/5.5/ 6.00 There are 28pcs in imperial, and each piece is represented by the number of teeth per inch from 4-62 teeth, especially as the number of teeth: 4/4.5/5 /6/7/8/9/10/11/12/13/14/16/ 18/19/20/22/24/25/26/30/28/32/36/40/48/60/62 Package List 1 x Thread Pitch Gauge 3 x Neutral Gauge