Always start your print at the correct distance from the bed with this original Creality 3D kit to upgrade your CR10 V2 or V3 3D printer, adding the ability to automatically level the bed. The detection pin pushes out before the leveling sequence starts, and is retracted before your print start to avoid collisions with your print. The BLTouch works with many printbed surfaces like glass, tape, wood, PEI, etc. Before mounting the sensor, please watch the Creality instruction video to avoid damage to your printer or BLTouch.