All the different heads you need to file and buff and shine your nails. The file itself sits easy in the hand and you can hold it just fine in either hand. It runs on 2 AA batteries ( not iuncluded). It is quiet when you turn it on yet powerful enough to get the job done. Is way faster than an old paper emery board.#Rankboostererview #Sponsored #TouchBeauty https://www.amazon.com/TOUCHBeauty-Pen-shaped-Professional-Manicure-Fingernails/dp/B06XBVLP25