SainSmart CNC Router Z-Axis Tool Setting Touch Probe, Compatible with Grbl/Mach 3

* With a mouse click, CNC machines will automatically return to a predefined position, allowing you to easily change and calibrate your tools. * Z-Axis tool setting touch probe works with Mach3, Grblcontrol(Candle) * Makes setting tool height a breeze, no more using the paper. * Auto-Check setting probe.