I regard a Chinese tool like this as a kit. It has all the required parts and even comes assembled, but you have to take care of final fit and finish yourself and occasionally upgrade some of the parts.This tool came very near ready-to-use after some small assembly steps like installing the quill handles and the chuck. One of the gib adjusting screws interferes with the handles, so you'll need to replace that one with an M5 x 14 or 16 mm set screw. You could probably leave it out for a while and it would work just fine.The design is remarkably similar to the DeWalt that sells for more than four times the price. The drill motor slides in dovetail ways in the base. Both dovetails are aluminum, although the base slides are covered with galvanized steel cover plates, I suppose to minimize galling. The quill lever is reversable. It comes on the right side as pictured but can be swapped to the right side by removing an M6 socket-head cap screw. On mine, if that screw is tightened up, it causes the handle to bind. I'll work out some way to fix that, maybe by loctite-ing the screw in its "not-quite-all-the-way-in" position with blue Loctite or coming up with a spacer of the right description.I bought this to chain-drill several feet of 2"-thick cast iron my saw isn't big enough to handle. It works just fine for that job and I'm sure I'll be glad to have the option from time-to-time, but it's not going to be a tool I use frequently. If you use one frequently, you might want to invest in a name-brand model, but this one did the job for me and was the right price range, especially given its very occasional use.The motor is single speed (500 RPM I believe) which is fine for 1/4" holes in cast iron, which is what I've used it for. I also bought a $15 motor speed controller I thought I would wire into the drill motor circuit if I needed it. Those cheap controllers cut the torque along with the RPM, so I'm not sure that approach would work with annular cutters. Something to think
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