I also have this digitizing probe that came with the Shopbot which we sold some time ago so have no way of testing it. We never used it but, because the Shopbot was bought second hand I have no way of knowing if it works. It has no scratches or marks of any kind including none on the mounting shaft and the probe moves and returns smoothly. However, I see the folded black lead wire has a kink in it and I don’t have the other part of the connector as shown on the ShopbotTools site. I’d suggest payment via some service like Paypal that offers recourse in the event that it turns out to be defective. My apologies in advance for the longwinded explanation. $US175.