Dail Indicator Bracket for this dail indicator for leveling your 3d printer.

https://www.ebay.com/itm/0-01mm-Accuracy-Measurement-Instrument-Gauge-Precision-Tool-Dial-Indicator-New-/122549402800

Used by placing it on the Stepper motor of the hotend, by 4x magnets 5x5mm

https://www.ebay.com/itm/N45-5x5x5mm-Cube-Cuboid-Block-Strong-Neodymium-Rare-Earth-Magnets-Block-Magnetic/222920670493?hash=item33e71b7d1d:m:m4h_wg9wDX0c6TzJW1GNPDg:rk:1:pf:0