This product is a high-precision measurement tool that can quickly and easily set mechanical spindle and workpiece datumexact center position: accuracy and reproducibility of competent drilling, milling, boring and grinding jigs, etc.The precision positioning work.Color:Silver blackMaterial:metalDimensions:probe:4mm(DIA)total length: 90x18mm(LXW)shank: 10mm(DIA)Unplug finder's pins, the spring can be replaced.Edge finder's role is to determine the position of the workpiece on the machine, which determine the working coordinate system.applies to traditional milling machines and machining centerswith the speed 400-600rpm use.the mechanical rotation measurements,no clamping errors, repeat the measurement accuracy up to within 0.005mm.specially designed probe 4mm, provide for a small aperture is narrow trench and measured using.the lower end of the rotation part is magnetically shielded.Package include:1 x Precision Edge FinderNote: Light 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.