Trim Shim is used to make minor adjustments. Ideal to use when installing trim, crown molding, base board, doors, windows, and counter tops where a larger length shim is not required. Also works well for hobby and craft projects. 100% kiln dried wood. 3.5 inches long. Warning: drilling,sawing sanding or machining wood products can expose you to wood dust,a substance known to the State of California to cause cancer, Avoid inhailing dust or use a dust mask or other safeguards to personal protection. - Wood dust