Hi Cindy, This looks like the head end of the handpiece of a dental video imaging system. Usually these are used in disposal sheaths which are thrown away after each use, and in other cases where the head end optics are detachable from the handgrip containing the CCD (as looks to be the case here) the dentist may sterilise this in an autoclave between uses (allowing use without sheaths, problem being that the prism optics will degrade over time). I'm sure we all have 'fond' memories of being on the end of one of these at various times. I used to develop a software product in the dental industry (very entertaining days), and that unit does look familiar but I can't remember the name of the manufacturer. I have a small stack of similar (old) units in the garage, I keep telling myself I should get one out and check my own teeth.. Cheers Evan -----Original Message----- From: cctalk [mailto:cctalk-bounces at classiccmp.org] On Behalf Of Electronics Plus Sent: Wednesday, 11 February 2015 6:54 AM To: 'General Discussion: On-Topic and Off-Topic Posts' Subject: OT: Can anyone identify this tool? https://plus.google.com/photos/106111250846948401252/albums/6114301294379699 009?banner=pwa I picked it up, new, at the recycler, thinking it was a drill bit, but it is not. It is 13 cm long, and has a light or lens of some sort at the small end. The large end is about 3/4". It appears to be made of stainless steel. Engraved on it is QD90-6722. I added another pic, showing the larger end. There is a lens of some sort inside, and light shines through to the lens at the smaller end. Cindy Croxton