These chair seats are made of a special kind of fiberboard that will not separate. They can be trimmed with shears, tin snips, or a band saw, and can be painted, stained, sealed, or used as is. These seats should be installed using Decorative Nails. We recommend using item #H76 for installation of the seats because they have small heads with a low dome. The nails can be spaced according to taste, but not to exceed two inches from center of tack to center of tack.