I compared this unit to my Dremel version and I was presently surprised at the quality of this unit. The plastic of the handle felt the same as the name brand and the sheathing on the outside feels like a quality covering. I like that this one came with the metal springs on each end to keep the cable from binding where as my name brand does not have the same feature. The one part I was very disappointed about was that this unit did not come with any tools (where as my name brand version came with the necessary tools) to loosen the lock nut, it should have a small wrench and pin to lock and loosen the lock nut. If you don’t have the small wrench that came with your Dremel then you will have to use a pair of pliers to loosen the lock nut and a small screw driver in place of the pin. This would have been a 5 star review IF it had come with the required tools as not everyone will have them just lying around or in their Dremel bag. The actual operation of the unit was very comparable to the name brand and it worked flawlessly even on the highest speed.
If you have never used one of these before I will explain it. you first remove the nut on the end of your Dremel and loosen the lock nut for your cut off wheels etc then slip the small inner cable of this unit into the lock nut and tighten it then just screw this onto your Dremel. On the other end of this unit you have a similar lock nut for your attachments and you just insert the pin into the hole near the end to keep the lock nut from spinning then loosen the lock nut, insert your attachment and tighten the lock nut.