Amazon.com: Universal 3D Sensor, CNC 3D Touch Probe Edge Finder, Tungsten Steel CNC Probe 3D Edge Locator Support XYZ Coordinate Stroke, 3D Measuring Sensor Kit with Storage Box for Mach3 for GRBL :
CNC 3D LOW profile digitizing touch probe (3axis) with MAGNETIC CONNECTOR
Touch Probes – CraftyCNC
CNC 3D Touch probe Measuring sensor - Amastone | amastone®
MR-1 - Electronic Touch Probe – Langmuir Systems
XYZ Touch Probe Precise Plug and Play CNC Processing GRBL Mach3 Tool Sensor for Ultimate Bee QueenBee WorkBee Machine 3D Printer - AliExpress
CNC Touch Probe China Manufacturer & Supply - SilverCNC