Roller Contact Point for Dial Digital Indicators Depth Gauge M2.5 Thread 10mm Diameter Wheel Metric Fits dial indicator, height gauge, depth gauge, M2.5 thread gauge, and other interchangeable tools Suitable for the surfaces of moving workpieces, or surfaces where the workpiece needs to slide to one side, for precise measurement of depth or height differences The material is stainless steel, which is - Product Name:Roller Contact Point Product specifications:M2.5 Thread Shank 10mm(0.394in) Diameter Roller Point Colour:Silver Material:Metal Package Contents: 1 * Roller Contact Point 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.