a hobbyist necessity [SEP] finding that i could really use a tool similar to a dremel rotary machine but not as costly i chose this basically for the price it is simple and does what i need it to do pleasantly surprised that so many different sizes of accessories are included my only complaint is the on off switch to power on one starts out at low speed another click and you go to medium once more to high then once again to off a simple on off switch would be better but it is cheap and it does the job it is rechargeable cannot replace battery and charges through a usb adapter it is inexpensive enough that when it does fail it will not pain me to simply toss it so far i am a happy hobbyist