This is a Bijur manual oiler. The square frame has 4 threaded holes for mounting. This oiler has been tested and it works fine. There is a glass view port to monitor oil levels. ^ Just pull up on the oil valve shaft button, and oil comes forth when you release it. You can oil fast or slow; a little or a lot. ^ These oilers were made to facilitate milling or lathing lubrication. ^ Check out the pics! ^ Check out our Feedback! Message us about any problem, and you will have our attention in a HURRY. It’s just that I don’t know what the cost will be, since I don’t know where my customer will live. ANYWAY– Just contact me and I can give you a DEAL. It works this way…. They also read all my messages. A WORD OF ADVICE. If you see something that you like and it is a price you can afford…. Because, while you are trying to carve a few pennies off of the price, someone else comes in and buys it at full price. I have seen this happen over and over again. Many of my items are very hard to find. ^ DOLLAR BILL: If you see a dollar bill in any of the photos it DOES NOT come included with the item. It is judge size and perspective only. DO YOU LIKE THIS STUFF? CHECK OUT OUR STORE! NO OTHER STORE IS LIKE OURS. YOU WILL BE SURPRISED AT THE VARIETY YOU WILL FIND THERE. If you like our service, do the same for us! Of course, if you order at any time from Friday noon through Sunday morning, there will probably be an extra day or two delay. ^ My Offer Policy: If you choose to make an offer on this item, here are some things you should know: I do not have time to play games with multiple offers. If I give you the same counter offer twice, that means that that is my bottom price FOR NOW. If you do not like the price on my item, wait a month! ^ About our store: We are a family business. Here is what we do: We procure your special items; we test and check them out as if we were going to use them ourselves. We pack it like we expect it to arrive safely at your doorstep, and we respond immediately to any problems you may have.