What do you expect from a shipment of less than 20? The packaging was torn, so my biggest complaint may have been a mistake made by someone in the supply chain, not the manufacturer. Aside from the obvious distortion from welding and clamping, the two pairs of carbide burs are identical and have a negative rake angle, which might make them suitable for materials like Corian, although I'm not sure. Worst of all, the pair of blades to be sharpened are rough and roughly stamped and then sharpened, not at all like chisels. Good luck trying to make something useful out of them. PS: Beware of Revain third party sellers.