Very simple and easy to use. Keeps joints uniform and prevents crushing. Lay the forks across the block or brick, set a unit on top and tap down until seated. Mortar stiffins in seconds so the next step is to just pull one out and continue same procedure down the row. Concave designed Compacting Trowel not only finishes the joint up nice but compresses the mortar ensuring better moisture resistance. Listing includes 2 Mason Forks and 1 Trowel. www.BlockandBrickSpacer.com