1. Application: It is suitable for the centering measurement of the circling table and the diameter measurement of the wheel set; 2. Material: tool steel material, durable; 3. Product size: The size of the calibration gauge is about 340x147x3mm; 4. Function: Keep your current stand working. Gauge for reset the center of wheel truing stand; 5. Tick marks: There are size scale marks, which can better understand the size of the wheel . Type: Multifunction Tools Colour:silver Material:tool steel Package Contents: 1 X Correction Gauge Only the above package content, other products are not included. Note: Light reflection 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.