This is described as a "66-piece” accessory kit. There are 14 blades and two sanding bases, so there must be about 50 pieces of sandpaper.Buying an assortment of parts is often a "mixed bag.” On one hand, the assortment gives you a sampling of what’s available, so you can try different things to determine what is most useful for your own purposes. On the other hand, you may end up with items you don’t need.If you’ve been using an oscillating tool for a long time, you already know your usage pattSee full review