This is an in-line detail sander, which comes with a set of rubber profiles and a diamond shaped sanding pad. I bought it in the misguided belief that it would be suitable for finish sanding of hardwood and MDF mouldings. (As I already have a delta sander, I am not that interested in the flat sanding pad, although the linear action is subtly different from an orbital action, and it might be useful for sanding with the grain.) The motor and gearbox seem to be of good quality, but the design of the profile holder at the business end looks like a failed first attempt that should never have made it into production. The rubber profiles are a push fit into the plastic holder, and yes, they do fall out frequently, which is very, very annoying. The profile holder clips to the oscillating base, and because it is a large and flimsy plastic part under considerable stress, it rattles loudly. I can't imagine it would last very long, but then I can't imagine anyone choosing to use this tool for long enough to wear it out either. Another strange compromise is the oscillating counterbalance which reduces the tool vibration very effectively, but only when there is nothing attached to the base. With the holder and a profile attached, there is a considerable amount of vibration. Why wasn't it balanced so that the vibration was minimised in the working configuration? According to the catalogue, the kit comes with a 'complete selection' of abrasives. In fact what I received is three hook and loop diamond shaped sheets (one each coarse, medium, and fine), and a single roll of 80 grit self-adhesive (PSA) abrasive for the profiles. The diamond shaped sheets are effective for flat detail sanding, but because they are a proprietary shape, replacements are not readily available. 80 grit is very coarse for a finish sander and the PSA abrasive quality is abysmal. It wears out extremely fast and the adhesive barely sticks to the r
ubber profiles, even after washing and drying them as instructed. I've also tried Hermes abrasive: it lasts ten times as long, but still doesn't stick very well to the very rough rubber surface of the profiles. (Some are rougher than others: it might be OK on the smoother ones.) Combined with the very fast and furious sanding action, the supplied 80 grit paper produces a truly terrible finish on mouldings. (But the damage is soon limited by the profile block falling out of the holder.) So far I've not managed to do any useful work with this product, and I am running out of patience. I thought that Porter-Cable has a good reputation, and this tool was far from cheap, so I didn't expect it to be completely useless. Just shows how wrong you can be. This is the first PC tool that I've bought, and because of this disappointing experience it will definitely be the last. I should have read some reviews before I shelled out a fair bit of money. I hope that my comments will help others to avoid making the same mistake.